The Muscular System- Histology and Physiology $100 $200 $300 $400 $500 $100$100$100 $200 $300 $400...

The Muscular System- Histology and Physiology

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Structureand

Function

FINAL ROUND

Physiology of Skeletal Muscle

Fibers

Contraction of Whole

Muscles

Muscle Metabolism

Other Muscle Types

Structure and Function of Skeletal Muscle:

$100 Question

Each muscle cell (fiber) is surrounded by this tissue:

a. perimysium

b. endomysium

c. epimysium

d. sarcolemma

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ANSWER


$100 Answer

Each muscle cell (fiber) is surrounded by this tissue:

a. perimysium

b. endomysium

c. epimysium

d. sarcolemma

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$200 Question

This statement best describes the muscle property of extensibility:

a. muscles recoil to original shape

b. muscles shorten forcefully

c. muscles can stretch when needed

d. muscles contract when stimulated

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ANSWER


$200 Answer

This statement best describes the muscle property of extensibility:

a. muscles recoil to original shape

b. muscles shorten forcefully

c. muscles can stretch when needed

d. muscles contract when stimulated

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$300 Question

Troponin binds to this:

a. G actin

b. calcium ions

c. tropomyosin

d. all of these

e. a and c only

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ANSWER


$300 Answer

Troponin binds to this:

a. G actin

b. calcium ions

c. tropomyosin

d. all of these

e. a and c only

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$400 Question

During muscle contraction, this region shortens:

a. A band

b. I band

c. H zone

d. both a and b

e. both b and cBACK TO GAME

ANSWER


$400 Answer

During muscle contraction, this region shortens:

a. A band

b. I band

c. H zone

d. both a and b

e. both b and c

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$500 Question

These statements about myosin myofilaments are all true except:

a. are thicker than actin

b. make up the H zone

c. attached to the Z disc

d. attached to filaments that form the M line

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ANSWER


$500 Answer

These statements about myosin myofilaments are all true except:

a. are thicker than actin

b. make up the H zone

c. attached to the Z disc

d. attached to filaments that form the M line

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Physiology of Skeletal Muscle Fibers:

$100 Question

The resting membrane potential occurs when:

a. Na+ ions diffuse into the cell

b. Na+ ions diffuse out of the cell

c. K+ ions diffuse into the cell

d. K+ ions diffuse out of the cell

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ANSWER


$100 Answer

The resting membrane potential occurs when:

a. Na+ ions diffuse into the cell

b. Na+ ions diffuse out of the cell

c. K+ ions diffuse into the cell

d. K+ ions diffuse out of the cell

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$200 Question

Depolarization must reach this value in a cell to trigger an action potential:

a. 0 mv

b. +20 mv

c. -85 mv

d. threshold

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ANSWER


$200 Answer

Depolarization must reach this value in a cell to trigger an action potential:

a. 0 mv

b. +20 mv

c. -85 mv

d. threshold

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$300 Question

Energy is needed to make muscles contract and relax.

True/False

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ANSWER


$300 Answer

Energy is needed to make muscles contract and relax.

True/False

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$400 Question

These events occur during contraction except:

a. exposure of active sites on actin

b. active transport of Ca+ back into sarcoplasmic reticulum

c. cross-bridges are formed and released

d. power strokeBACK TO GAME

ANSWER


$400 Answer

These events occur during contraction except:

a. exposure of active sites on actin

b. active transport of Ca+ back into sarcoplasmic reticulum

c. cross-bridges are formed and released

d. power strokeBACK TO GAME


$500 Question

List the events occurring at a neuromuscular junction in order.

1. ACh binds to receptors on postsynaptic membrane

2. acetylcholinesterase breaks down ACh

3. choline is reabsorbed by presynaptic membrane

4. depolarization of sarcolemma

5. ligand-gated Na+ ion channels open

a. 1,5,4,2,3 c. 1,4,2,3,5

b. 5,3,2,1,4 d. 1,5,2,3,4 BACK TO GAME

ANSWER


$500 Answer

List the events occurring at a neuromuscular junction in order.

1. ACh binds to receptors on postsynaptic membrane

2. acetylcholinesterase breaks down ACh

3. choline is reabsorbed by presynaptic membrane

4. depolarization of sarcolemma

5. ligand-gated Na+ ion channels open

a. 1,5,4,2,3 c. 1,4,2,3,5

b. 5,3,2,1,4 d. 1,5,2,3,4 BACK TO GAME

Contraction of Whole Muscle:

$100 Question

This stimulus results in the greatest force of contraction because all motor units of a muscle are responding:

a. threshold

b. subthreshold

c. maximal

d. supramaximal

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ANSWER


$100 Answer

This stimulus results in the greatest force of contraction because all motor units of a muscle are responding:

a. threshold

b. subthreshold

c. maximal

d. supramaximal

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$200 Question

This kind of contraction results in an increase of tension, but the length of the muscle does not change:

a. isometric

b. isotonic

c. concentric

d. eccentric

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ANSWER


$200 Answer

This kind of contraction results in an increase of tension, but the length of the muscle does not change:

a. isometric

b. isotonic

c. concentric

d. eccentric

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$300 Question

Incomplete tetanus occurs when action potentials are produced so rapidly that the muscle completely contracts without any relaxation.

True/False

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ANSWER


$300 Answer

Incomplete tetanus occurs when action potentials are produced so rapidly that the muscle completely contracts without any relaxation.

True/False

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$400 Question

These conditions occur in both physiologic contracture and rigor mortis except:

a. low levels of ATP

b. cross-bridges are formed

c. release of cross-bridges

d. Ca2+ builds up in the sarcoplasm

e. active transport of Ca2+ slows or stops

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ANSWER


$400 Answer

These conditions occur in both physiologic contracture and rigor mortis except:

a. low levels of ATP

b. cross-bridges are formed

c. release of cross-bridges

d. Ca2+ builds up in the sarcoplasm

e. active transport of Ca2+ slows or stops

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$500 Question

Given the following:

1. Ca2+ ions are actively transported back into sarcoplasmic reticulum

2. Troponin-tropomyosin complexes move to inhibit cross-bridge formation

3. Muscle fibers lengthen passively

These events best describe:

a. treppe c. contraction phase

b. lag phase d. relaxation phaseBACK TO GAME

ANSWER


$500 Answer

Given the following:

1. Ca2+ ions are actively transported back into sarcoplasmic reticulum

2. Troponin-tropomyosin complexes move to inhibit cross-bridge formation

3. Muscle fibers lengthen passively

These events best describe:

a. treppe c. contraction phase

b. lag phase d. relaxation phase

BACK TO GAME

Muscle Metabolism:

$100 Question

Because large amounts of ATP are stored in muscle fibers, it does not need to be continuously synthesized in order to sustain muscle contractions.

True/False

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ANSWER

Muscle Metabolism:

$100 Answer

Because large amounts of ATP are stored in muscle fibers, it does not need to be continuously synthesized in order to sustain muscle contractions.

True/False

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Muscle Metabolism:

$200 Question

These statements about creatine phosphate are true except:

a. accumulates in cells to store energy

b. ADP reacts with it to produce ATP

c. creatine kinase is used as a catalyst

d. supports intense exercise for up to 3 minutes

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ANSWER

Muscle Metabolism:

$200 Answer

These statements about creatine phosphate are true except:

a. accumulates in cells to store energy

b. ADP reacts with it to produce ATP

c. creatine kinase is used as a catalyst

d. supports intense exercise for up to 3 minutes

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Muscle Metabolism:

$300 Question

Recovery consumption is used to restore homeostasis after the following:

a. increase in body temperature

b. changes in intracellular ion concentrations

c. changes in extracellular ion concentrations

d. changes in hormone levels

e. all of these BACK TO GAME

ANSWER

Muscle Metabolism:

$300 Answer

Recovery consumption is used to restore homeostasis after the following:

a. increase in body temperature

b. changes in intracellular ion concentrations

c. changes in extracellular ion concentrations

d. changes in hormone levels

e. all of these BACK TO GAME

Muscle Metabolism:

$400 Question

Johnny’s primary source of energy comes from this as he runs on his treadmill for 30 minutes every morning:

a. stored ATP

b. aerobic respiration

c. anaerobic respiration

d. creatine phosphate

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ANSWER

Muscle Metabolism:

$400 Answer

Johnny’s primary source of energy comes from this as he runs on his treadmill for 30 minutes every morning:

a. stored ATP

b. aerobic respiration

c. anaerobic respiration

d. creatine phosphate

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Muscle Metabolism: $500 Question

This statement is true about anaerobic respiration:

a. produces 38 ATPs per glucose molecule

b. uses fatty acids for sustained exercise

c. can produce ATP rapidly

d. uses citric acid cycle BACK TO GAME

ANSWER

Muscle Metabolism: $500 Answer

This statement is true about anaerobic respiration:

a. produces 38 ATPs per glucose molecule

b. uses fatty acids for sustained exercise

c. can produce ATP rapidly

d. uses citric acid cycle

BACK TO GAME

Other Muscle Types:

$100 Question

These structural characteristics apply to cardiac muscle:

a. single, centrally located nucleus

b. spindle shaped

c. striated

d. gap junctions hold cells to one another

e. a and cBACK TO GAME

ANSWER

Other Muscle Types:

$100 Answer

These structural characteristics apply to cardiac muscle:

a. single, centrally located nucleus

b. spindle shaped

c. striated

d. gap junctions hold cells to one another

e. a and c BACK TO GAME

Other Muscle Types:

$200 Question

The depolarization of cardiac muscle results from the influx of both Na+ and Ca2+ across the plasma membrane.

True/False

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ANSWER

Other Muscle Types:

$200 Answer

The depolarization of cardiac muscle results from the influx of both Na+ and Ca2+ across the plasma membrane.

True/False

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Other Muscle Types:

$300 Question

These are all properties of smooth muscle except:

a. contracts when stretched

b. autorhythmic

c. responds in all-or-none fashion to action potentials

d. exhibits relatively constant tension

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ANSWER

Other Muscle Types:

$300 Answer

These are all properties of smooth muscle except:

a. contracts when stretched

b. autorhythmic

c. responds in all-or-none fashion to action potentials

d. exhibits relatively constant tension

BACK TO GAME

Other Muscle Types:

$400 Question

These are the most important neurotransmitters that regulate smooth muscle:

a. acetylcholine

b. norepinephrine

c. dopamine

d. epinephrine

e. a and bBACK TO GAME

ANSWER

Other Muscle Types:

$400 Answer

These are the most important neurotransmitters that regulate smooth muscle:

a. acetylcholine

b. norepinephrine

c. dopamine

d. epinephrine

e. a and bBACK TO GAME

Other Muscle Types:

$500 Question

Waves of contraction traverse an entire sheet of visceral (unitary) smooth muscle due to the numerous gap junctions that allow action potentials to pass directly from cell to cell.

True/False

BACK TO GAME

ANSWER

Other Muscle Types:

$500 Answer

Waves of contraction traverse an entire sheet of visceral (unitary) smooth muscle due to the numerous gap junctions that allow action potentials to pass directly from cell to cell.

True/False

BACK TO GAME

FINAL ROUND Question

This condition would be found within the leg muscle cells of a good sprinter:

a. myoglobin-rich

b. contract more slowly

c. large deposits of glycogen

d. primarily aerobic

e. numerous mitochondriaBACK TO GAME

ANSWER

FINAL ROUND Answer

This condition would be found within the leg muscle cells of a good sprinter:

a. myoglobin-rich

b. contract more slowly

c. large deposits of glycogen

d. primarily aerobic

e. numerous mitochondriaBACK TO GAME

The Muscular System- Histology and Physiology $100 $200 $300 $400 $500 $100$100$100 $200 $300 $400...

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