FOOD FUELSTORED ASSITE CarbohydrateGlucose Glycogen Excess as adipose tissue Blood Muscle and liver...
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Transcript of FOOD FUELSTORED ASSITE CarbohydrateGlucose Glycogen Excess as adipose tissue Blood Muscle and liver...
THE MUSCULAR SYSTEM Identify the dominant energy pathway utilised in a variety of aerobic or anaerobic activities determined by the intensity and duration of the activity. Collect, analyse and report on primary data related to responses to exercise and anaerobic and aerobic pathways.
ENERGY SYSTEMS
MOVEMENT
INTERPLAY
FOOD FUELS
ATP-PC SYSTEMAlactacid
Phosphocreatine
Anaerobic GlycolosisLactic Acid
Lactacid system
Aerobic EnergyAerobic Glycolysis
OxygenMUSCLE FIBRES
ENERGY SYSTEMS
All body movements require energy for muscle contraction. A clear understanding of energy systems will help you to understand your body better.
FOODS & THEIR CONVERSION TO
ENERGY Food is the primary source of energy, but it cannot be used directly
Digestion breaks down the food into nutrients that are absorbed into the bloodstream.
Some of this fuel is used immediately for energy and the remainder is stored in different ways for different reasons
HOW FOOD IS STORED IN THE BODY
FOOD FUEL STORED AS SITE
Carbohydrate GlucoseGlycogenExcess as adipose tissue
BloodMuscle and liverAround the body
Fat Fatty acidsTriglyceridesAdipose tissue
BloodMuscleAround the body
Protein MuscleAmino acids
Around the body
CARBOHYDRATES
We need carbohydrates to fuel physical activity
They are the body’s preferred source of fuel – especially during exercise
Carbohydrates are important in activities lasting longer than 1 hour
Carbohydrate intake is vital before, during and after exercise to meet the fuel requirements
CARBOHYDRATES Carbohydrates are the sugars and
starches found in fruit, cereal, bread, pasta and vegetables.
Carbohydrates are major food fuels for the production of ATP
There are 2 forms of carbs – blood glucose and muscle and liver glycogen
Carbohydrate in foods are converted to glucose for immediate energy and to glycogen to be stored in the muscle
The blood carries glucose to the muscle through the aid of insulin
The pancreas secretes insulin in response to the increase in blood glucose
CARBOHYDRATES GLYCOGEN – the form in which
carbohydrates are stored in the muscle and liver
INSULIN – a hormone that regulates the level of glucose in the blood
PANCREAS – a gland that is both an endocrine and exocrine gland
Not all glucose is used immediately – excess glucose is stored in the liver as glycogen. When extra energy is required, the glycogen is converted back to glucose to be used within the muscle
FATS Fats are essential in our diet
and perform many vital roles. Fats are involved in:
Protecting body organs
Maintaining body temperature
Hormone production
Energy systems for the body
NOT ALL FAT IS BAD!!
In your table groups:
Come up with 2 good sources of fat and 2 bad sources of fat
FATS
Fats are not all the same – some fats are better than others
Essential Fatty Acids (EFA’s) such as Omega-3 are vital to overall health and wellbeing
Sources of Omega-3 are tuna and salmon
There are other forms of fats such as lipids which come in the form of butter, margarine, eggs, oil and nuts
FATS
Fats are found in the body in the form of triglycerides, stored in the fat cells (adipose tissue) located throughout the body and in skeletal tissue
Triglycerides are broken down into free fatty acids, which are broken down aerobically to provide energy for movement
Fat’s are the body’s preferred source of fuel at rest: as you sit here writing these notes your body is using fat
However, the conversion rate is less efficient than other fuel sources
PROTEINS Proteins are
often called the building blocks of the body
Foods that are rich in protein – meat, fish, poultry, eggs and cereal
Their main role in the body is for growth and repair of tissue
All enzymes (which speed up chemical reactions) are proteins
The basic structual unit of proteins are amino acids
Protein is often associated with strength building exercises
1. Carbohydrates in foods are converted to:A/ glycogen for immediate energy.B/ glucose for immediate energy and to glycogen to be stored in muscle.C/ oxygen.D/ omega 3.
2. Fats:A/ are capable of producing more ATP than
carbohydratesB/ require less time than triglycerides to break
down.C/ require less oxygen than glucose to produce
ATP.D/ in terms of the total amount of energy
produced, have a lower energy content than carbohydrates.
3. Proteins:A/ are more complex and have larger molecules than
either carbohydrates or fatsB/ have a higher energy content than fats in terms of
total amount of energy producedC/ involve the least complex chemical reactions to split
PCD/ do not use oxygen
REVISION QUESTIONS