Military High School

AL- Ain

Grade 11 &12

Biology Sample Questions

Student Name:_________________________________________

Computer #:___________________________________________

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Chapter 1: Nutrition

In all multiple choice questions, more than answer could be correct

Section №: 1 The Need for Food

01. Which of the following is TRUE? Food is needed:-

1. for growth. ____________

2. as a source of energy. ____________

3. for replacement of worn out and damaged tissue. ____________

02. Plants obtain their own food by ______________ (respiration/ photosynthesis)

which is building up of complex substances from simple substances by using sun’s energy.

03. How do animals obtain their food?

___________________________________________

Section №: 2 Principle Sources and Importance of Various Classes of Food

04. What are the three main classes of food?

______________________________________________

05. Cellulose and starch are normally present in _______________________

06. Which of the following is NOT a carbohydrate?

[-A-] Insulin

[-B-] Sucrose

[-C-] Starch

[-D-] Glucose

07. The important sources of carbohydrates include sugar, starch and ___________

08. What is the function of carbohydrates?

___________________________________________

09. 1 gram of carbohydrates produces __________________KJ.

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10. In the body, excess carbohydrate is converted into ____________________

and _____________________.

11. The carbohydrate found in dietary fiber is _______________________

12. The following food can be considered as a source of plant protein:-

[-A-] Cereals [-B-] Wheat

[-C-] Meat [-D-] Cheese

[-E-] Milk

13. 1 gram of protein produces ________ KJ.

14. The most important function of proteins in the diet is:-

[-A-] Most readily available source of energy

[-B-] Insulate the body

[-C-] Protect body organs

[-D-] Aid in building cells, tissues and enzymes

15. 100 g of baked beans contains 4.5 g of protein. How many grams of beans would provide a

daily protein requirement of 81 g?

A 5.5g

B 18g

C 364.5g

D 1800 g

16. Essential amino acids are _________ (synthesized/ not synthesized) in the body,

while non-essential amino acids _______ (can be synthesized/can’t be synthesized).

17. When dealing with excess amino acids, the body changes the acidic group of the deaminated

amino acid into _________________________________

18. List some examples of foods that are rich in lipids.

______________________________________________

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19. Which of the following is NOT a function of lipids?

[-A-] Releases Energy

[-B-] Reduce heat loss

[-C-] Form cell membranes

[-D-] Helps in building

20. ________ (Carbohydrates/ Proteins/ Lipids/ Vitamins) makes an ideal store material in

the body.

21. 1 gram of lipids produces ___________________ KJ.

22 If a slice of bread contains 3 grams of fat, 20 grams of carbohydrate and 4 gram of proteins,

how many KJ does it contain?

______________________________________________

______________________________________________

23. Excess carbohydrates in the diet are converted into ________ and _________.

24. The order in which foods are broken down by the body is:

______________________________________________

25. A mineral salt is made up of __________ and __________

26. The main function of iron in the body is _______________________ .

27. An individual suffering from anemia is characterized by _________________

______________________________________________

28. The deficiency disease caused by a lack of iron in diet is _______________ .

29. What is the main function of calcium in body?

[-A-] Insulation of body

[-B-] Source of energy

[-C-] Formation of haemoglobin

[-D-] Strengthening bones and teeth

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30. The deficiency disease caused by a lack of Calcium is called ______________

31. If calcium is deficient, the bones become _______ (hard/ soft/ very hard).

32. Which of the following foods is NOT a main source of phosphorus?

[-A-] Cheese [-B-] Meat

[-C-] Fish [-D-] Water

33.Vitamins are classified into _________-soluble and _______-soluble.

34. Do you need vitamins in large amounts? ________________________

35 The function of Vitamin A is _____________________________

36 The deficiency disease caused by a lack of Vitamin A is called ______________

37. The function of Vitamin D is _____________________________

38. The deficiency disease caused by a lack of Vitamin D is called _____________ .

39. The function of Vitamin C is _____________________________

40. The deficiency disease caused by a lack of Vitamin C is called ______________________

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Chapter 2: The Digestive System

Section №: 1 Process of Human Nutrition

01. _________ (Digestion/ Ingestion/ Absorption/ Assimilation/ Egestion) is the act of

taking food into the mouth.

02. __________ is the breaking down of large insoluble molecules into smaller soluble

molecules.

03. _________ is the process where dissolved food is passed from the intestine into the

blood stream and carried by the blood around the body.

04. _________ is the uptake of food in the body.

05. _______________ is the act of expelling food which can’t be digested.

Section №: 2 The Alimentary Canal

06. Mucus is secreted by ___________ cells, which line the alimentary canal.

07. _______________ are organs that secrete digestive enzymes.

08. The glands which are _________ (outside/ inside) the alimentary canal can secrete

their enzymes to the gut through ducts.

09. ___________________________ are examples of glands present in

the gastrointestinal tract.

10. ________________ is the process where muscular contraction of the walls of

the alimentary canal pushes food along it.

11. The diagram shows some food moving along the alimentary canal.

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What is the name of the process that pushes the food along?

A absorption

B digestion

C peristalsis

D swallowing

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12. Label the following diagram:

Section №: 3 The Process of Digestion

13. Which of the following is TRUE saliva? _____________

[-A-] It is neutral.

[-B-] It breaks down starch.

[-C-] It makes food easier to swallow.

[-D-] It is acidic.

[-E-] It is basic.

14. Salivary glands produce mucus to

A lubricate the food in the stomach

B lubricate the food to aid swallowing

C protect the mouth from amylase

D protect the esophagus from amylase.

15. Cooked starch is broken down into maltose by ____________________.

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16. Which of the following is TRUE about pepsin?

[-A-] It requires acid to function.

[-B-] It is produced in the stomach.

[-C-] It converts carbohydrates to sugars.

[-D-] It is secreted in an inactive form (pepsinogen).

17. Which chemical reaction takes place in the stomach?

A Proteins are digested by protease.

B Proteins are digested into fatty acids.

C Starch is digested into amino acids.

D Starch is digested by lipase..

18. Which of the following is a function of hydrochloric acid in the stomach?

[-A-] To produce the optimum pH for pepsin function.

[-B-] To convert inactive trypsin (trypsinogen) to active trypsin.

[-D-] To convert the inactive pepsin (pepsinogen) to active pepsin

19. Mucus and inactive pepsin can protect the ___________ (stomach/ small intestine)

against self-digestion.

20. ___________ and ___________ are parts of the small intestine.

21. Pancreatic juice contains enzymes and ________________________.

22. ___________ enzyme present in the pancreatic juice converts peptides to amino

acids.

23. __________ enzyme converts fats to fatty acids and glycerol.

24. __________ enzyme converts starch to maltose.

25. Pancreatic ___________________________ neutralizes acid.

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26. Bile is produced in the ___________.

A liver

B gall bladder

C stomach

D small intestine.

Section №: 4 Absorption, Assimilation and Egestion

27. ____________ (egestion/ ingestion/ absorption/ assimilation/ digestion) of food

takes place mainly in the small intestine

28. Fats are stored in ____________ (adipose tissues/ heart/ stomach/ large intestine/

small intestine) in the abdomen, around the kidneys and under the skin.

29. In the liver, excess amino acids are deaminated (amino group is removed) and the acidic

group is converted into ____________ (fats/ proteins/ glucose/ glycogen).

Section №: 5 The Liver

30. Which of the following sentences describe(s) regulation of blood sugar?

1 After a meal the liver removes excess glucose from blood and stores it as glycogen.

2 Between meals, the liver converts glycogen to glucose.

3 Amino acids are converted to urea.

31. ____________ stored in the liver comes from haemoglobin.

32. ____________ is the plasma protein used in blood clotting.

33._________________ the process where poisonous substances are converted

into harmless substances in the liver.

34. Vitamins __________ and __________ are stored in the liver.

35. ___________ is the maintenance of a constant internal environment.

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Chapter 3: Breathing in Humans

Section №: 1 The Human Respiratory System

01. __________ (Breathing/ Digestion/ Ingestion) is a mechanical process, involving the

process of exchanging gases like __________ and ____________ between the

organism and its surrounding environment.

02. The release of energy from food is called ____________ (breathing/ digestion/

aerobic respiration/ ingestion).

03. The structures used to carry out breathing make up the _______________

(digestive/ respiratory/ nervous) system.

04. Label the following diagram about the respiratory system:

05. What is the pathway taken by air from the nose to the lungs?

_____________ → _____________ → ___________ → __________ →

___________ → ____________ → ____________

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06. Carbon dioxide is removed from the body through the lungs. The correct pathway taken

by a molecule of carbon dioxide out of the lungs is

[-A-] alveoli → bronchioles → bronchi → trachea

[-B-] trachea → bronchi → bronchioles → alveoli

[-C-] alveoli → bronchi → bronchioles → trachea

[-D-] trachea → bronchioles → bronchi → alveoli.

07. The trachea and bronchi are kept open by rings of ____________________.

08. The microscopic air sacs present at the end of each bronchiole are called _________ .

(trachea/ bronchi/ bronchioles/ alveoli/ stomach).

09. _________ (Bronchi/ Bronchioles/ Trachea/ Alveoli/ Cilia and Mucus) prevent(s)

harmful particles entering the alveoli.

10. When __________ (bronchi/ bronchioles/ trachea/ alveoli/ cilia) move, it directs the

mucus that contains unwanted particles up into the _________ (stomach/ nose/ throat/

arm).

11. Gas exchange occurs in the lungs by __________ (osmosis/ diffusion/ facilitated

diffusion/ active transport).

12. The exchange of carbon dioxide and oxygen gases occurs in the ____________ (trachea/

bronchi/ bronchioles/ cilia/ alveoli).

13. The diagram shows part of an alveolus and part of a nearby capillary.

The arrows show the direction of movement of carbon dioxide and oxygen.

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By which process do these gases move?

[-A-] active transport

[-B-] diffusion

[-C-] osmosis

[-D-] none of the above

14 The diagram below shows an air sac with part of its capillary network.

At which position would blood with the highest concentration of oxygen be found? (A, B, C, D)

15. Which of the following is NOT an adaptation of the lung for gas exchange?

1 Large surface area

2 Poor ventilation

3 Moist surface

4 Thin walls

Section №: 2 Process of Taking In and Expelling Air

16. ____________ (Ventilation/ Digestion/ Absorption) is the movement of air into

and out of the lungs.

17. What causes oxygen to diffuse into the blood from an alveolus (air sac) in the lungs?

A The oxygen concentration in the alveolus is higher than in the atmosphere.

B The oxygen concentration in the alveolus is lower than in the blood.

C The oxygen concentration in the atmosphere is higher than the carbon dioxide

concentration.

D The oxygen concentration in the blood is lower than in the alveolus.

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18. During inspiration, the ribs move ___________ (inward/ outward), the diaphragm

____________ (relaxes/ contracts) and the lung volume _____________ (decreases/ increases).

19. When we breathe in the ribs move ________________________ and the diaphragm

_____________________ .

20. During expiration, the ribs move ___________ (inward/ outward), the diaphragm

____________ (relaxes/ contracts) and the lung volume _____________ (decreases/

increases).

21. When we breathe out the ribs move ____________________________ and the diaphragm

_________________________

22. The ___________ reduce the friction between the lungs and thorax during

inhalation or exhalation. What is the missing phrase?

1 Mucus within the bronchioles

2 Moisture in exhaled air

3 Fluid within the pleural membranes

4 Pulmonary blood supply

Section №: 3 Volume of Air in the Lungs

23. The volume of tidal air breathed in and out by a healthy adult is __________ (0.5/ 1/ 1.5/ 2.5/

3.5/ 5) liters.

24. The __________ (residual/ vital capacity/ total lung) volume (1.5 L) is the air

remaining in the lungs after your deepest exhalation.

25. The total lung volume of an adult is __________ (0.5/ 1/ 1.5/ 2.5/ 3.5/ 5) Liters.

26. The graph shows a person’s heart rate before, during and after a period of exercise.

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At which point did the period of exercise stop? ______________________________

27. What happens to the depth and rate of breathing during increased physical activity? (H)

28. The list below refers to breathing.

1 Breathing rate increases and depth of breathing decreases

2 Breathing rate increases and depth of breathing increases

3 Rate of gas exchange increases

Which of the following correctly describes what happens during exercise?

A 1 only

B 2 only

C 1 and 3 only

D 2 and 3 only

29. A student’s rate and depth of breathing are measured before exercise and then after exercise.

The results are plotted on two graphs showing the volume of air breathed in and out in

12 seconds. (H)

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After exercise, how much air does the student take in during 12 seconds?

A 0.5 dm3 B 1 dm3 C 1.5 dm3 D 8 dm3

Section №: 5 Tobacco Smoke and its Adverse Effects on Human Health

30. Which of the following effects is caused by carbon monoxide from cigarette smoke?

1 Less oxygen carried in the blood

2 Cilia stop beating

3 Mucus collects in the lungs

4 Lung cancer

31. Which of the following cause lung disease?

1. Smoking

2. Air pollution

3. Passive smoking

4. All of the above

32. Weakening of the ____________ (trachea/ bronchi/ bronchioles/ alveoli) causes

emphysema.

33. Which substance in cigarette smoke causes lung cancer?

A carbon dioxide

B carbon monoxide

C nicotine

D tar

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34. Smoking during pregnancy:-

1 increases the risk of miscarriage

2 increases the baby weight

3 increases the risk of low birth weight

4 increases the risk of still birth

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Chapter 4: Transport in Animal – Blood

Section №: 1 Major Blood Components

01. The main components of blood include these structures.

[-A-] Skin [-B-] White blood cell

[-C-] Plasma [-D-] Platelets

[-E-] Red blood cell [-F-] Brain

02. The blood, blood vessels and heart are called the ___________ (circulatory,

respiratory, excretory, digestive) system.

03. The blood cells that lack a nucleus and have a biconcave shape are called _________.

04. The cytoplasm of __________ is full of hemoglobin.

[-A-] Plasma

[-B-] White blood cells

[-C-] Platelets

[-D-] Red blood cells

05. The main function of red blood cells is to:-

[-A-] defend the body against viruses and bacteria

[-B-] transport oxygen from the lungs to the body tissues

[-C-] release chemicals to make blood clot and prevent bleeding from wounds

[-D-] contain many dissolved substances such as ions, proteins nutrients, hormones and excretory

products

06. The number of red blood cells ________________ per cubic millimeter (mm3).

07. The average life span of a red blood cells is _______________ (360/ 120/ 90) days.

08. What are the blood cells that are irregularly shaped, large and have a nucleus?

______________________________________________

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09. ____________ (plasma/ Red blood cells/ White blood cells/ Platelets) defend the

body against viruses and bacteria.

10. The number of white blood cells __________ per cubic millimeter (mm3).

11. The photograph shows some blood as seen under the microscope.

What is the function of the cell labelled X?

A blood clotting

B carrying oxygen

C defending against disease

D transporting hormones

12. The number of platelets ___________ per cubic millimeter (mm3) of blood.

13. The main function of platelets is to:-

[-A-] defend the body against viruses and bacteria

[-B-] transport oxygen from the lungs to the body tissues

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[-C-] make blood clot and prevent bleeding from wounds

[-D-] contain many dissolved substances such as ions, proteins nutrients, hormones and excretory

products

14. White blood cells and red blood cells are made in the ____________ (plasma,

liver, red blood cells, bone marrow, white blood cells).

15. The main component of blood plasma is ____________ (albumin, water, urea,

hormones, glucose).

Section №: 2 Importance of a Blood Circulatory System

16. Which of the following represents a role of blood in transport?

[-A-] transport oxygen from the lungs to the body

[-B-] transport hormones from the glands to the target organs

[-C-] transport urea from the liver to kidneys

[-D-] distribute heat around the body

[-E-] transport urea from bone marrow to liver

17. ___________ (Plasma, Red blood cells, Platelets, White blood cells, Antigens)

transport oxygen and a little carbon dioxide.

18. The structures in the blood that contain hemoglobin are:

A. Red blood cells

B. White blood cells

C. Platelets

D. Phagocytes

19. Blood leaving the lungs is ______(oxygenated/ deoxygenated).

20. When hemoglobin combines with the ____________, it forms oxyhemoglobin.

21. When oxyhemoglobin gives up some of its oxygen to active tissues low in oxygen, it is then

called ____________________. What is the missing word?

22. Oxygenated blood [-A-] contains oxyhemoglobin

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[-B-] gives up oxygen to active tissues

[-C-] has low levels of hydrogen carbonate ions

[-D-] is a bright red color

[-E-] is all of the above

23. The graph below shows the relationship between the concentration of carbon dioxide and

oxyhemoglobin in the blood.

Which of the following describes this relationship?

A As the carbon dioxide concentration decreases, the concentration of

oxyhaemoglobin decreases.

B As the carbon dioxide concentration increases, the concentration of

oxyhaemoglobin decreases.

C As the carbon dioxide concentration increases, the concentration of

oxyhaemoglobin increases.

D As the carbon dioxide concentration increases, it has no effect upon the

concentration of oxyhaemoglobin.

24. ____________ (carbon dioxide/ oxygen/ carbon/ nitrogen/ sulphur) is mostly

transported as hydrogen carbonate ions.

25. The products of digestion (nutrients such as glucose and amino acids) and waste products are

carried

[-A-] by platelets

[-B-] by red blood cells

[-C-] by white blood cells

[-D-] dissolved in the plasma

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26. The diagram below shows human blood as seen through a microscope.

The two parts of the blood involved in the transport of substances around the body.

A Plasma and white blood cells.

B Red blood cells and white blood cells.

C Red blood cells and plasma

D Plasma

27. In question 26, the type of cells that can produce antibodies is/are:

A plasma

B white blood cells

C Red blood cells

D Red blood cells and white blood cells

28. In question 26, most of the carbon dioxide is transported through

A plasma

B white blood cells

C Red blood cells

D Red blood cells and white blood cells

29. Place the following in the correct sequence for blood clotting:

1 Fibrinogen converts to fibrin. ( )

2 Platelets clump together and release a chemical for blood clotting. ( )

3 Red blood cells are trapped and form a blood clot. ( )

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30. White blood cells that engulf bacteria are called _____________ (antigens/

antibodies/

red blood cells/ phagocytes/ lymphocytes).

31. ____________ (Lymphocytes/ Red blood cells/ Antigens/ Antibodies) manufacture

antibodies which clump the bacteria together and give future immunity.

32. Which line in the table below identifies correctly how lymphocytes destroy bacteria?

33. An antibody is a:

A A specific protein that binds to any cell in the body.

B A specific protein that binds to a specific antigen.

C Any lipid molecule that binds to all antigens.

D A specific lipid molecule that binds to a specific antigen.

34. Antibodies give us immunity to a specific disease because they:

A disable specific bacterial cells and make them stick together.

B disable other specific antibodies to prevent them from attacking us.

C activate specific antigens in our blood.

D activate all antigens in our blood.

35. A person is said to be immune if he has __________ (antigens/ antibodies/ vaccines/

antibiotics) to a disease and therefore cannot suffer from the disease.

36. ____________ (Antibodies/ Antigens/ Vaccines/ Antibiotics) are considered to be

specific because they give immunity to one disease.

37. Natural immunity is gained ____________.

[-A-] after taking a vaccine

[-B-] after recovering from a disease

[-C-] after taking an antibiotic

[-D-] after heavy exercise

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38. ____________ (Artificial/ Natural) immunity is gained by injections of ______

(vaccines/ antibiotics).

39. Vaccine is a ____________ (natural/ harmless/ toxic/ harmful) form of a disease-

causing bacteria or virus.

Section №: 3 Blood Transfusions and Organ Transplants

40. What are the human blood groups?

_____________________________________________

41. Blood group ‘A’ includes ____(A, B, AB, O, D, No) antigen and____(anti-A, anti-B,

anti-D, anti-Rh, anti-O, No) antibodies.

42. Blood group ‘B’ includes _______(A, B, AB, O, D, No) antigen and ____(anti-A, anti-B,

anti-D, anti-Rh, anti-O, No) antibodies.

43. Blood group ‘AB’ includes ____ (A, B, O, D, No) antigen and ___(anti-A, anti-B,

anti-D, anti-Rh, anti-O, No) antibodies.

44. Blood group ‘O’ includes ____ (A, B, AB, O, D, No) antigen and ___ (anti-A, anti-B,

anti-D, anti-Rh, anti-O, No) antibodies.

45. A drop of a person’s blood shows clumping in anti-A and anti-B serum. This person’s blood

group is:

[-A-] A

[-B-] B

[-C-] AB

[-D-] O

46. A drop of a person’s blood shows clumping in anti-A but not in anti-B. This person’s blood

group is:

[-A-] A

[-B-] B

[-C-] AB

[-D-] O

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47. A person called a universal donor has blood group ______________________.

48. A person called a universal recipient has blood group ____________.

49. The graph below shows the percentage of a population with blood groups A, B, AB and O.

What percentage of the population has either blood group A or blood group B?

A 3%

B 48%

C 52%

D 55%

50. When an organ is transplanted the

[-A-] antigens of the donor and recipient must match closely

[-B-] antigens of the donor and recipient must be different

[-C-] donor must be universal

[-D-] recipient must be universal

51. _____________ (Serums/ Vaccines/ Antibodies/ Antibiotics/

Immunosuppressant) are taken by patients to minimize the chance of transplant rejection.

52. Immunosuppressant drugs work by:

A increasing the activity of the immune system.

B decreasing the activity of the immune system

C increasing the production of red blood cells.

D increasing the ability to fight infections

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Chapter 5: Transport in Animals- The Heart and Blood Vessels

In all multiple choice questions, more than answer could be correct

Section №: 1 The Heart is the Pump for the Blood Circulatory System

01. The _____________ (lung/ skin/ kidney/ heart/ eye) is a muscular organ that pumps blood

around the body.

02. The function of the heart is to:

A Absorb oxygen from atmospheric air.

B Pump blood around the body.

C Digest food.

D Get rid of waste products.

03. Give the correct name of blood vessels in the figure below:

04. The heart is made up of a special muscle called ____________ (pulmonary/ biceps/ triceps/

cardiac) muscle.

05. Oxygenated blood enters the heart through the ____________ (pulmonary artery/ pulmonary

vein/ aorta/ vena cava).

06. Deoxygenated blood enters the heart through the ____________ (pulmonary artery/

pulmonary vein/ aorta/ vena cava).

07. The pulmonary vein carries blood from the ____________ to the ____________ (left/ right)

atrium.

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08. The vena cava is the largest vein in the body. It carries blood from the ____________ (heart/

lung/ body organs) to the ____________ (left/ right) atrium.

09. The aorta carries blood from the ____________ (right/ left) ventricle in the heart to the

_____________ (body/ heart).

10. The pulmonary artery carries blood from the ____________ (heart/ lung/ body) to the __

__________ (heart/ lung/ body).

11. The diagram shows the directions of blood flow through a heart.

Which chamber of the heart receives blood directly from the lungs? ______________________

12. The diagram below shows a cross section of a human heart.

Which line in the table identifies the parts of the heart correctly?

Vessel X Chamber Y

A Aorta Left ventricle

A B

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B Vena cava Left ventricle

C Vena cava Right ventricle

D Aorta Right ventricle

13. Cardiac muscle is called myogenic because

1. it becomes fatigued

2. it slows down in response to exercise

3. it is a voluntary muscle

4. it initiates its own contraction

14. The heart muscle initiates its own contraction, that’s why it is called:

A a muscle

B an organ

C a nerve

D myogenic

15. The wall of the right ventricle is __________ (thicker/ thinner) than that of the left ventricle

because it pumps blood to the lungs only.

16. The walls of the left ventricle is thicker than the walls of the right ventricle because it has to:

A Pump blood to all the body.

B Pump blood to the lungs.

C Receive blood from the body.

D Receive blood from the lungs.

Section №: 2 Role of Valves in the Heart and Some Blood Vessels

17. The tricuspid valve and the bicuspid valve are called ___________ valves because they

prevent backflow of blood between the atria and ventricles.

A semi-lunar

B atrial

C ventricular

D atrio-ventricular

18. The semilunar valves and atrio-ventricular valves in the heart

1. propel blood along the vessels

2. are controlled by the brain

3. are opened and shut by muscles

4. prevent the backflow of blood

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19. The _____________ valves prevent the backflow of blood from the arteries to the

ventricles.

A semi-lunar

B atrial

C ventricular

D atrio-ventricular

Section №: 3 How the Heart Pumps Blood

20. The cardiac muscle contracts and relaxes rhythmically. This repeated cycle is called the

_____________.

A heartbeat

B pulmonary beat

C lung beat

D liver beat

21. At the beginning of a heart-beat (diastole), which of the following does NOT occur?

1. Semilunar valves shut

2. The ventricles relax

3. The atria contract

4. Atrio-ventricular valves open

5. Blood enters the heart

22. During atrial systole, the muscles of the _____________(ventricles/ atria/ biceps/

triceps) contract while the muscles of the __________ (ventricles/ atria/ biceps/ triceps)

remain relaxed.

23. During ventricular systole, the muscles of the _________ (ventricles/ atria/ biceps/

triceps) contract while the muscles of the __________ (ventricles/ atria/ biceps/ triceps)

remain relaxed.

24. The diagram shows a section through the human heart.

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What happens as blood is being pumped out of the heart?

Semilunar valves Vessel through which blood passes

to the lungs

A Open 1

B Open 2

C Closed 1

D Closed 2

25. The blood pressure in a healthy human is __________ systolic and ___________ diastolic.

26. The pulse is a ___________ (wave/ constant) line of pressure caused by blood being pushed

out of the ventricles.

27. The pulse is recorded as the ______________________________. It

can be felt in the ____________ and the ___________. Upon exercising, the

pulse __________ (decreases/ increases).

28. During exercise, the heart rate increases in order to __________ (supply/ remove) oxygen and

glucose to the muscles and to ____________ (supply/ remove) carbon dioxide and heat.

29. The pulse rate of a student was recorded before, during and after two minutes of

exercise.

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The results are shown in the graph below.

What was the time taken for his pulse rate to return to normal after the exercise had

stopped?

A 8 minutes

B 10 minutes

C 12 minutes

D 16 minutes

Page | 32

Military High School

AL- Ain

Grade 10 &11

Biology Sample Questions

Answer Key

Student Name:_________________________________________

Computer #:___________________________________________

Page | 33

Chapter 1: Nutrition

In all multiple choice questions, more than answer could be correct

Section №: 1 The Need for Food

01. Which of the following is TRUE? Food is needed:-

1. for growth. ____________

2. as a source of energy. ____________

3. for replacement of worn out and damaged tissue. ____________

02. Plants obtain their own food by ______________ (respiration/ photosynthesis)

which is building up of complex substances from simple substances by using sun’s energy.

03. How do animals obtain their food?

___________________________________________

Section №: 2 Principle Sources and Importance of Various Classes of Food

04. What are the three main classes of food?

______________________________________________

05. Cellulose and starch are normally present in _______________________

06. Which of the following is NOT a carbohydrate?

[-A-] Insulin

[-B-] Sucrose

[-C-] Starch

[-D-] Glucose

07. The important sources of carbohydrates include sugar, starch and ___________

08. What is the function of carbohydrates?

___________________________________________

09. 1 gram of carbohydrates produces __________________KJ.

True

True

True

By feeding on other organisms.

Carbohydrates – Proteins - Lipids

plant

cellulose

Carbohydrates are the readily available source of energy.

17

Page | 34

10. In the body, excess carbohydrate is converted into ____________________

and _____________________.

11. The carbohydrate found in dietary fiber is _______________________

12. The following food can be considered as a source of plant protein:-

[-A-] Cereals [-B-] Wheat

[-C-] Meat [-D-] Cheese

[-E-] Milk

13. 1 gram of protein produces ________ KJ.

14. The most important function of proteins in the diet is:-

[-A-] Most readily available source of energy

[-B-] Insulate the body

[-C-] Protect body organs

[-D-] Aid in building cells, tissues and enzymes

15. 100 g of baked beans contains 4.5 g of protein. How many grams of beans would provide a

daily protein requirement of 81 g?

A 5.5g

B 18g

C 364.5g

D 1800 g

16. Essential amino acids are _________ (synthesized/ not synthesized) in the body,

while non-essential amino acids _______ (can be synthesized/can’t be synthesized).

17. When dealing with excess amino acids, the body changes the acidic group of the deaminated

amino acid into _________________________________

18. List some examples of foods that are rich in lipids.

______________________________________________

glycogen

fats

celluose

17

glycogen

meat, milk, eggs, cheese, butter and oils

Page | 35

19. Which of the following is NOT a function of lipids?

[-A-] Releases Energy

[-B-] Reduce heat loss

[-C-] Form cell membranes

[-D-] Helps in building

20. ________ (Carbohydrates/ Proteins/ Lipids/ Vitamins) makes an ideal store material in

the body.

14. Know how many kilojoules are produced by one gram of lipid

21. 1 gram of lipids produces ___________________ KJ.

22 If a slice of bread contains 3 grams of fat, 20 grams of carbohydrate and 4 gram of proteins,

how many KJ does it contain?

______________________________________________

______________________________________________

23. Excess carbohydrates in the diet are converted into ________ and _________.

24. The order in which foods are broken down by the body is:

______________________________________________

25. A mineral salt is made up of __________ and __________ ions.

26. The main function of iron in the body is _______________________ .

27. An individual suffering from anemia is characterized by _________________

28. The deficiency disease caused by a lack of iron in diet is _______________ . 29. What is the main function of calcium in body?

[-A-] Insulation of body

[-B-] Source of energy

[-C-] Formation of haemoglobin

[-D-] Strengthening bones and teeth

39

(3*39) + (20*17)+(4*17) =525 KJ

glycogen

fats

Carbohydrates -lipids (fats) - Proteins

metal non-metal

formation of hemoglobin

looking pale and feeling tired

anemia

Page | 36

30. The deficiency disease caused by a lack of Calcium is called ______________

31. If calcium is deficient, the bones become _______ (hard/ soft/ very hard).

32. Which of the following foods is NOT a main source of phosphorus?

[-A-] Cheese [-B-] Meat

[-C-] Fish [-D-] Water

33.Vitamins are classified into _________-soluble and _______-soluble.

34. Do you need vitamins in large amounts? ________________________

35 The function of Vitamin A is _____________________________

36 The deficiency disease caused by a lack of Vitamin A is called ______________

37. The function of Vitamin D is _____________________________

38. The deficiency disease caused by a lack of Vitamin D is called _____________ .

39. The function of Vitamin C is _____________________________

40. The deficiency disease caused by a lack of Vitamin C is called ______________________

rickets

water fat

No

needed to make retinol( light sensitive pigment) for proper night vision

night blindness

hardening of bones and teeth

rickets

maintaining of healthy skin and gum

scurvy

Page | 37

Chapter 2: The Digestive System

Section №: 1 Process of Human Nutrition

01. _________ (Digestion/ Ingestion/ Absorption/ Assimilation/ Egestion) is the act of

taking food into the mouth.

02. __________ is the breaking down of large insoluble molecules into smaller soluble

molecules.

03. _________ is the process where dissolved food is passed from the intestine into the

blood stream and carried by the blood around the body.

04. _________ is the uptake of food in the body.

05. _______________ is the act of expelling food which can’t be digested.

Section №: 2 The Alimentary Canal

06. Mucus is secreted by ___________ cells, which line the alimentary canal.

07. _______________ are organs that secrete digestive enzymes.

08. The glands which are _________ (outside/ inside) the alimentary canal can secrete

their enzymes to the gut through ducts.

09. ___________________________ are examples of glands present in

the gastrointestinal tract.

10. ________________ is the process where muscular contraction of the walls of

the alimentary canal pushes food along it.

11. The diagram shows some food moving along the alimentary canal.

Digestion

Absorption

Assimilation

Egestion

goblet

Glands

Liver, pancreas and salivary glands

Peristalsis

Page | 38

What is the name of the process that pushes the food along?

A absorption

B digestion

C peristalsis

D swallowing

Page | 39

12. Label the following diagram:

Section №: 3 The Process of Digestion

13. Which of the following is TRUE saliva? _____________

[-A-] It is neutral.

[-B-] It breaks down starch.

[-C-] It makes food easier to swallow.

[-D-] It is acidic.

[-E-] It is basic.

14. Salivary glands produce mucus to:

A lubricate the food in the stomach

B lubricate the food to aid swallowing

C protect the mouth from amylase

D protect the esophagus from amylase.

15. Cooked starch is broken down into maltose by ____________________.

16. Which of the following is TRUE about pepsin?

[-A-] It requires acid to function.

[-B-] It is produced in the stomach.

[-C-] It converts carbohydrates to sugars.

[-D-] It is secreted in an inactive form (pepsinogen).

salivary amylase

Page | 40

17. Which chemical reaction takes place in the stomach?

A Proteins are digested by protease.

B Proteins are digested into fatty acids.

C Starch is digested into amino acids.

D Starch is digested by lipase..

18. Which of the following is a function of hydrochloric acid in the stomach?

[-A-] To produce the optimum pH for pepsin function.

[-B-] To convert inactive trypsin (trypsinogen) to active trypsin.

[-C-] To convert the inactive pepsin (pepsinogen) to active pepsin

[-D] To kill bacteria and fungi

19. Mucus and inactive pepsin can protect the ___________ (stomach/ small intestine)

against self-digestion.

20. ___________ and ___________ are parts of the small intestine.

21. Pancreatic juice contains enzymes and ________________________.

22. ___________ enzyme present in the pancreatic juice converts peptides to amino

acids.

23. __________ enzyme converts fats to fatty acids and glycerol.

24. __________ enzyme converts starch to maltose.

10. Know two functions of sodium hydrogen carbonate*

25. Pancreatic ___________________________ neutralizes acid.

26. Bile is produced in the ___________.

A liver

B gall bladder

C stomach

D small intestine.

Section №: 4 Absorption, Assimilation and Egestion

duodenum ileum

sodium hydrogen carbonate

Trypsin

Pancreatic lipase

lipase+-

Pancreatic amylase

sodium hydrogen carbonate

Page | 41

27. ____________ (egestion/ ingestion/ absorption/ assimilation/ digestion) of food

takes place mainly in the small intestine

28. Fats are stored in ____________ (adipose tissues/ heart/ stomach/ large intestine/

small intestine) in the abdomen, around the kidneys and under the skin.

29. In the liver, excess amino acids are deaminated (amino group is removed) and the acidic

group is converted into ____________ (fats/ proteins/ glucose/ glycogen).

Section №: 5 The Liver

30. Which of the following sentences describe(s) regulation of blood sugar?

1 After a meal the liver removes excess glucose from blood and stores it as glycogen.

2 Between meals, the liver converts glycogen to glucose.

3 Amino acids are converted to urea.

31. ____________ stored in the liver comes from haemoglobin.

32. ____________ is the plasma protein used in blood clotting.

33._________________ the process where poisonous substances are converted

into harmless substances in the liver.

34. Vitamins __________ and __________ are stored in the liver.

35. ___________ is the maintenance of a constant internal environment.

Iron

Fibrinogen

Detoxification

A D

Homeostasis

Page | 42

Chapter 3: Breathing in Humans

Section №: 1 The Human Respiratory System

01. __________ (Breathing/ Digestion/ Ingestion) is a mechanical process, involving the

process of exchanging gases like __________ and ____________ between the

organism and its surrounding environment.

02. The release of energy from food is called ____________ (breathing/ digestion/

aerobic respiration/ ingestion).

03. The structures used to carry out breathing make up the _______________

(digestive/ respiratory/ nervous) system.

04. Label the following diagram about the respiratory system:

05. What is the pathway taken by air from the nose to the lungs?

_____________ → _____________ → ___________ → __________ →

___________ → ____________ → ____________

carbon dioxide

dioxidedioxide

oxygen

Mouth/ nose pharynx Larynx Trachea

Bronchi Bronchiole Alveoli

Page | 43

06. Carbon dioxide is removed from the body through the lungs. The correct pathway taken

by a molecule of carbon dioxide out of the lungs is

[-A-] alveoli → bronchioles → bronchi → trachea

[-B-] trachea → bronchi → bronchioles → alveoli

[-C-] alveoli → bronchi → bronchioles → trachea

[-D-] trachea → bronchioles → bronchi → alveoli.

07. The trachea and bronchi are kept open by rings of ____________________.

08. The microscopic air sacs present at the end of each bronchiole are called _________ .

(trachea/ bronchi/ bronchioles/ alveoli/ stomach).

09. _________ (Bronchi/ Bronchioles/ Trachea/ Alveoli/ Cilia and Mucus) prevent(s)

harmful particles entering the alveoli.

10. When __________ (bronchi/ bronchioles/ trachea/ alveoli/ cilia) move, it directs the

mucus that contains unwanted particles up into the _________ (stomach/ nose/ throat/

arm).

11. Gas exchange occurs in the lungs by __________ (osmosis/ diffusion/ facilitated

diffusion/ active transport).

12. The exchange of carbon dioxide and oxygen gases occurs in the ____________ (trachea/

bronchi/ bronchioles/ cilia/ alveoli).

13. The diagram shows part of an alveolus and part of a nearby capillary.

The arrows show the direction of movement of carbon dioxide and oxygen.

cartilage

Page | 44

By which process do these gases move?

[-A-] active transport

[-B-] diffusion

[-C-] osmosis

[-D-] none of the above

14 The diagram below shows an air sac with part of its capillary network.

At which position would blood with the highest concentration of oxygen be found? (A, B, C, D)

15. Which of the following is NOT an adaptation of the lung for gas exchange?

1 Large surface area

2 Poor ventilation

3 Moist surface

4 Thin walls

Section №: 2 Process of Taking In and Expelling Air

16. ____________ (Ventilation/ Digestion/ Absorption) is the movement of air into

and out of the lungs.

17. What causes oxygen to diffuse into the blood from an alveolus (air sac) in the lungs?

A The oxygen concentration in the alveolus is higher than in the atmosphere.

B The oxygen concentration in the alveolus is lower than in the blood.

C The oxygen concentration in the atmosphere is higher than the carbon dioxide

concentration.

D The oxygen concentration in the blood is lower than in the alveolus.

Page | 45

18. During inspiration, the ribs move ___________ (inward/ outward), the diaphragm

____________ (relaxes/ contracts) and the lung volume _____________ (decreases/ increases).

19. When we breathe in the ribs move ________________________ and the diaphragm

_____________________ .

3. Describe the mechanism of exhalation (expiration)

20. During expiration, the ribs move ___________ (inward/ outward), the diaphragm

____________ (relaxes/ contracts) and the lung volume _____________ (decreases/

increases).

21. When we breathe out the ribs move ____________________________ and the diaphragm

_________________________

22. The ___________ reduce the friction between the lungs and thorax during

inhalation or exhalation. What is the missing phrase?

1 Mucus within the bronchioles

2 Moisture in exhaled air

3 Fluid within the pleural membranes

4 Pulmonary blood supply

Section №: 3 Volume of Air in the Lungs

23. The volume of tidal air breathed in and out by a healthy adult is __________ (0.5/ 1/ 1.5/ 2.5/

3.5/ 5) liters.

24. The __________ (residual/ vital capacity/ total lung) volume (1.5 L) is the air

remaining in the lungs after your deepest exhalation.

25. The total lung volume of an adult is __________ (0.5/ 1/ 1.5/ 2.5/ 3.5/ 5) Liters.

upward and outward

contracts

downward and inward

relaxes

Page | 46

26. The graph shows a person’s heart rate before, during and after a period of exercise.

At which point did the period of exercise stop? ______C________________________

27. What happens to the depth and rate of breathing during increased physical activity?

28. The list below refers to breathing.

1 Breathing rate increases and depth of breathing decreases

2 Breathing rate increases and depth of breathing increases

3 Rate of gas exchange increases

Which of the following correctly describes what happens during exercise?

A 1 only

B 2 only

C 1 and 3 only

D 2 and 3 only

29. A student’s rate and depth of breathing are measured before exercise and then after exercise.

The results are plotted on two graphs showing the volume of air breathed in and out in

Page | 47

12 seconds.

After exercise, how much air does the student take in during 12 seconds?

A 0.5 dm3 B 1 dm3 C 1.5 dm3 D 8 dm3

Section №: 5 Tobacco Smoke and its Adverse Effects on Human Health

Concept №:

30. Which of the following effects is caused by carbon monoxide from cigarette smoke?

1 Less oxygen carried in the blood

2 Cilia stop beating

3 Mucus collects in the lungs

4 Lung cancer

31. Which of the following cause lung disease?

1. Smoking

2. Air pollution

3. Passive smoking

4. All of the above

32. Weakening of the ____________ (trachea/ bronchi/ bronchioles/ alveoli) causes

emphysema.

33. Which substance in cigarette smoke causes lung cancer?

A carbon dioxide

B carbon monoxide

C nicotine

D tar

Page | 48

34. Smoking during pregnancy:-

1 increases the risk of miscarriage

2 increases the baby weight

3 increases the risk of low birth weight

4 increases the risk of still birth

Page | 49

Chapter 4: Transport in Animal – Blood

Section №: 1 Major Blood Components

Concept №:

01. The main components of blood include these structures.

[-A-] Skin [-B-] White blood cell

[-C-] Plasma [-D-] Platelets

[-E-] Red blood cell [-F-] Brain

02. The blood, blood vessels and heart are called the ___________ (circulatory,

respiratory, excretory, digestive) system.

03. The blood cells that lack a nucleus and have a biconcave shape are called _________.

04. The cytoplasm of __________ is full of hemoglobin.

[-A-] Plasma

[-B-] White blood cells

[-C-] Platelets

[-D-] Red blood cells

05. The main function of red blood cells is to:-

[-A-] defend the body against viruses and bacteria

[-B-] transport oxygen from the lungs to the body tissues

[-C-] release chemicals to make blood clot and prevent bleeding from wounds

[-D-] contain many dissolved substances such as ions, proteins nutrients, hormones and excretory

products

06. The number of red blood cells ________________ per cubic millimeter (mm3).

07. The average life span of a red blood cells is _______________ (360/ 120/ 90) days.

08. What are the blood cells that are irregularly shaped, large and have a nucleus?

red blood cells

5,000,000

Page | 50

______________________________________________

09. ____________ (plasma/ Red blood cells/ White blood cells/ Platelets) defend the

body against viruses and bacteria.

10. The number of white blood cells __________ per cubic millimeter (mm3).

11. The photograph shows some blood as seen under the microscope.

What is the function of the cell labelled X?

A blood clotting

B carrying oxygen

C defending against disease

D transporting hormones

12. The number of platelets ___________ per cubic millimeter (mm3) of blood.

13. The main function of platelets is to:-

[-A-] defend the body against viruses and bacteria

[-B-] transport oxygen from the lungs to the body tissues

[-C-] make blood clot and prevent bleeding from wounds

White blood cells

7,000

250,000

Page | 51

[-D-] contain many dissolved substances such as ions, proteins nutrients, hormones and excretory

products

14. White blood cells and red blood cells are made in the ____________ (plasma,

liver, red blood cells, bone marrow, white blood cells).

15. The main component of blood plasma is ____________ (albumin, water, urea,

hormones, glucose).

Section №: 2 Importance of a Blood Circulatory System

16. Which of the following represents a role of blood in transport?

[-A-] transport oxygen from the lungs to the body

[-B-] transport hormones from the glands to the target organs

[-C-] transport urea from the liver to kidneys

[-D-] distribute heat around the body

[-E-] transport urea from bone marrow to liver

17. ___________ (Plasma, Red blood cells, Platelets, White blood cells, Antigens)

transport oxygen and a little carbon dioxide.

18. The structures in the blood that contain hemoglobin are:

A. Red blood cells

B. White blood cells

C. Platelets

D. Phagocytes

19. Blood leaving the lungs is ______(oxygenated/ deoxygenated).

20. When hemoglobin combines with the ____________, it forms oxyhemoglobin.

21. When oxyhemoglobin gives up some of its oxygen to active tissues low in oxygen, it is then

called ____________________. What is the missing word?

22. Oxygenated blood [-A-] contains oxyhemoglobin

[-B-] gives up oxygen to active tissues

[-C-] has low levels of hydrogen carbonate ions

[-D-] is a bright red color

[-E-] is all of the above

oxygen

deoxyhemoglobin

Page | 52

23. The graph below shows the relationship between the concentration of carbon dioxide and

oxyhemoglobin in the blood.

Which of the following describes this relationship?

A As the carbon dioxide concentration decreases, the concentration of

oxyhaemoglobin decreases.

B As the carbon dioxide concentration increases, the concentration of

oxyhaemoglobin decreases.

C As the carbon dioxide concentration increases, the concentration of

oxyhaemoglobin increases.

D As the carbon dioxide concentration increases, it has no effect upon the

concentration of oxyhaemoglobin.

24. ____________ (carbon dioxide/ oxygen/ carbon/ nitrogen/ sulphur) is mostly

transported as hydrogen carbonate ions.

25. The products of digestion (nutrients such as glucose and amino acids) and waste products are

carried

[-A-] by platelets

[-B-] by red blood cells

[-C-] by white blood cells

[-D-] dissolved in the plasma

Page | 53

26. The diagram below shows human blood as seen through a microscope.

The two parts of the blood involved in the transport of substances around the body.

A Plasma and white blood cells.

B Red blood cells and white blood cells.

C Red blood cells and plasma

D Plasma

27. In question 26, the type of cells that can produce antibodies is/are:

A plasma

B white blood cells

C Red blood cells

D Red blood cells and white blood cells

28. In question 26, most of the carbon dioxide is transported through

A plasma

B white blood cells

C Red blood cells

D Red blood cells and white blood cells

29. Place the following in the correct sequence for blood clotting:

1 Fibrinogen converts to fibrin. ( 2 )

2 Platelets clump together and release a chemical for blood clotting. ( 1 )

3 Red blood cells are trapped and form a blood clot. ( 3 )

30. White blood cells that engulf bacteria are called _____________ (antigens/

antibodies/ red blood cells/ phagocytes/ lymphocytes).

Page | 54

31. ____________ (Lymphocytes/ Red blood cells/ Antigens/ Antibodies) manufacture

antibodies which clump the bacteria together and give future immunity.

32. Which line in the table below identifies correctly how lymphocytes destroy bacteria?

33. An antibody is a:

A A specific protein that binds to any cell in the body.

B A specific protein that binds to a specific antigen.

C Any lipid molecule that binds to all antigens.

D A specific lipid molecule that binds to a specific antigen.

34. Antibodies give us immunity to a specific disease because they:

A disable specific bacterial cells and make them stick together.

B disable other specific antibodies to prevent them from attacking us.

C activate specific antigens in our blood.

D activate all antigens in our blood.

35. A person is said to be immune if he has __________ (antigens/ antibodies/ vaccines/

antibiotics) to a disease and therefore cannot suffer from the disease.

36. ____________ (Antibodies/ Antigens/ Vaccines/ Antibiotics) are considered to be

specific because they give immunity to one disease.

37. Natural immunity is gained ____________.

[-A-] after taking a vaccine

[-B-] after recovering from a disease

[-C-] after taking an antibiotic

[-D-] after heavy exercise

Page | 55

38. ____________ (Artificial/ Natural) immunity is gained by injections of

______(vaccines/ antibiotics).

39. Vaccine is a ____________ (natural/ harmless/ toxic/ harmful) form of a disease-

causing bacteria or virus.

Section №: 3 Blood Transfusions and Organ Transplants

40. What are the human blood groups?

_____________________________________________

41. Blood group ‘A’ includes ____(A, B, AB, O, D, No) antigen and____(anti-A, anti-B,

anti-D, anti-Rh, anti-O, No) antibodies.

42. Blood group ‘B’ includes _______(A, B, AB, O, D, No) antigen and ____(anti-A, anti-B,

anti-D, anti-Rh, anti-O, No) antibodies.

43. Blood group ‘AB’ includes ____ (A, B, O, D, No) antigen and ___(anti-A, anti-B,

anti-D, anti-Rh, anti-O, No) antibodies.

44. Blood group ‘O’ includes ____ (A, B, AB, O, D, No) antigen and ___ (anti-A, anti-B,

anti-D, anti-Rh, anti-O, No) antibodies.

45. A drop of a person’s blood shows clumping in anti-A and anti-B serum. This person’s blood

group is:

[-A-] A

[-B-] B

[-C-] AB

[-D-] O

46. A drop of a person’s blood shows clumping in anti-A but not in anti-B. This person’s blood

group is:

[-A-] A

[-B-] B

[-C-] AB

[-D-] O

A – B – AB – O

Page | 56

47. A person called a universal donor has blood group ______________________.

48. A person called a universal recipient has blood group ____________.

49. The graph below shows the percentage of a population with blood groups A, B, AB and O.

What percentage of the population has either blood group A or blood group B?

A 3%

B 48%

C 52%

D 55%

50. When an organ is transplanted the

[-A-] antigens of the donor and recipient must match closely

[-B-] antigens of the donor and recipient must be different

[-C-] donor must be universal

[-D-] recipient must be universal

51. _____________ (Serums/ Vaccines/ Antibodies/ Antibiotics/

Immunosuppressant) are taken by patients to minimize the chance of transplant rejection.

O

AB

Page | 57

52. Immunosuppressant drugs work by:

A increasing the activity of the immune system.

B decreasing the activity of the immune system

C increasing the production of red blood cells.

D increasing the ability to fight infections.

Page | 58

Chapter 5: Transport in Animals- The Heart and Blood Vessels

In all multiple choice questions, more than answer could be correct

Section №: 1 The Heart is the Pump for the Blood Circulatory System

01. The _____________ (lung/ skin/ kidney/ heart/ eye) is a muscular organ that pumps blood

around the body.

02. The function of the heart is to:

A Absorb oxygen from atmospheric air.

B Pump blood around the body.

C Digest food.

D Get rid of waste products.

03. Give the correct name of blood vessels in the figure below:

04. The heart is made up of a special muscle called ____________ (pulmonary/ biceps/ triceps/

cardiac) muscle.

05. Oxygenated blood enters the heart through the ____________ (pulmonary artery/ pulmonary

vein/ aorta/ vena cava).

06. Deoxygenated blood enters the heart through the ____________ (pulmonary artery/

pulmonary vein/ aorta/ vena cava).

07. The pulmonary vein carries blood from the ____________ to the ____________ (left/ right)

atrium.

08. The vena cava is the largest vein in the body. It carries blood from the ____________ (heart/

lungs

Page | 59

lung/ body organs) to the ____________ (left/ right) atrium.

09. The aorta carries blood from the ____________ (right/ left) ventricle in the heart to the

_____________ (body/ heart).

10. The pulmonary artery carries blood from the ____________ (heart/ lung/ body) to the __

__________ (heart/ lung/ body).

11. The diagram shows the directions of blood flow through a heart.

Which chamber of the heart receives blood directly from the lungs? ______________________

12. The diagram below shows a cross section of a human heart.

A B

B

Page | 60

Which line in the table identifies the parts of the heart correctly?

Vessel X Chamber Y

A Aorta Left ventricle

B Vena cava Left ventricle

C Vena cava Right ventricle

D Aorta Right ventricle

13. Cardiac muscle is called myogenic because

1. it becomes fatigued

2. it slows down in response to exercise

3. it is a voluntary muscle

4. it initiates its own contraction

14. The heart muscle initiates its own contraction, that’s why it is called:

A a muscle

B an organ

C a nerve

D myogenic

15. The wall of the right ventricle is __________ (thicker/ thinner) than that of the left ventricle

because it pumps blood to the lungs only.

16. The walls of the left ventricle is thicker than the walls of the right ventricle because it has to:

A Pump blood to all the body.

B Pump blood to the lungs.

C Receive blood from the body.

D Receive blood from the lungs.

Section №: 2 Role of Valves in the Heart and Some Blood Vessels

Page | 61

17. The tricuspid valve and the bicuspid valve are called ____________________ valves

because they prevent backflow of blood between the atria and ventricles.

A semi-lunar

B atrial

C ventricular

D atrio-ventricular

18. The semilunar valves and atrio-ventricular valves in the heart

1. propel blood along the vessels

2. are controlled by the brain

3. are opened and shut by muscles

4. prevent the backflow of blood

19. The _____________ valves prevent the backflow of blood from the arteries to the

ventricles.

A semi-lunar

B atrial

C ventricular

D atrio-ventricular

Section №: 3 How the Heart Pumps Blood

20. The cardiac muscle contracts and relaxes rhythmically. This repeated cycle is called the

_____________.

A heartbeat

B pulmonary beat

C lung beat

D liver beat

21. At the beginning of a heart-beat (diastole), which of the following does NOT occur?

1. Semilunar valves shut

2. The ventricles relax

3. The atria contract

4. Atrio-ventricular valves open

5. Blood enters the heart

22. During atrial systole, the muscles of the _____________(ventricles/ atria/ biceps/

triceps) contract while the muscles of the __________ (ventricles/ atria/ biceps/ triceps)

remain relaxed.

Page | 62

23. During ventricular systole, the muscles of the _________ (ventricles/ atria/ biceps/

triceps) contract while the muscles of the __________ (ventricles/ atria/ biceps/ triceps)

remain relaxed.

24. The diagram shows a section through the human heart.

What happens as blood is being pumped out of the heart?

Semilunar valves Vessel through which blood passes

to the lungs

A Open 1

B Open 2

C Closed 1

D Closed 2

25. The blood pressure in a healthy human is __________ systolic and ___________ diastolic.

26. The pulse is a ___________ (wave/ constant) line of pressure caused by blood being pushed

out of the ventricles.

27. The pulse is recorded as the ______________________________. It

can be felt in the ____________ and the ___________. Upon exercising, the

pulse __________ (decreases/ increases).

28.. During exercise, the heart rate increases in order to __________ (supply/ remove)

oxygen and glucose to the muscles and to ____________ (supply/ remove) carbon

dioxide and heat.

120 80

number of heart beats per minute

wrist neck

Page | 63

29. The pulse rate of a student was recorded before, during and after two minutes of

exercise.

The results are shown in the graph below.

What was the time taken for his pulse rate to return to normal after the exercise had

stopped?

A 8 minutes

B 10 minutes

C 12 minutes

D 16 minutes