Exercise Physiology 2 Flashcards Preview

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Flashcards in Exercise Physiology 2 Deck (5)
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1
Q

a bundle of muscle fibers is called:

a. periosteum
b. endomysium
c. fasciculus
d. sarcolemma

A

fasciculus

2
Q

to which of the following structures do the crossbriges attach during muscle action?

a. actin
b. myosin
c. M bridge
d. sarcolemma

A

Actin

3
Q

which of the following substances regulates muscle actions

a. potassium
b. calcium
c. phosphorus
d. selenium

A

calcium

4
Q

which of the following substances acts at the neuromuscular junction to excite the muscle fibers of the motor unit?

a. acetylcholine
b. ATP
c. creatine phosphate
d. serotonin

A

acetylcholine

5
Q

when throwing a baseball, an athletes arm is rapidly stretched just prior to throwing the ball. which of the following structures detects & responds to that stretch by reflexively increasing muscle activity?

a. golgi tendon organ
b. muscle spindle
c. extrafusal muscle
d. pacinian corpuscle

A

golgi tendon organ