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| 1 | |
Which of the following is not a function of the muscular system? |
| | A) | movement |
| | B) | joint stabilization |
| | C) | heat production |
| | D) | A, B, and C are all functions of the muscular system. |
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| 2 | |
The fascia layer that encircles a fascicle is called |
| | A) | endomysium |
| | B) | epimysium |
| | C) | perimysium |
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| 3 | |
Where are the calcium ions stored in a muscle fiber? |
| | A) | T-tubules |
| | B) | sarcolemma |
| | C) | sarcoplasmic reticulum |
| | D) | mitochondria |
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| 4 | |
Which of the following events lead to muscle fiber contraction occurs first? |
| | A) | Impulses travel down the T-tubules. |
| | B) | Calcium ions are released into the cytoplasm. |
| | C) | Actin filaments slide past myosin filaments. |
| | D) | ATP is hydrolyzed. |
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| 5 | |
Muscle fatigue occurs |
| | A) | when muscle fibers run out of ATP. |
| | B) | at the beginning of the latent period. |
| | C) | at the beginning of the relaxation period. |
| | D) | when lactic acid is completely broken down. |
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| 6 | |
Why do we breathe deeply following strenuous exercise, even while resting? |
| | A) | fatigue |
| | B) | oxygen deficit |
| | C) | lactic acid accumulation |
| | D) | B and C, but not A |
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| 7 | |
Where is lactic acid broken down into carbon dioxide and water? |
| | A) | liver |
| | B) | spleen |
| | C) | muscle fibers |
| | D) | kidneys |
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| 8 | |
Muscles that work opposite one another are called |
| | A) | antagonists |
| | B) | protagonists |
| | C) | synergists |
| | D) | prime movers |
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| 9 | |
Which of the following is not a member of the hamstring group? |
| | A) | biceps femoris |
| | B) | rectus femoris |
| | C) | semimembranosus |
| | D) | semitendinosus |
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| 10 | |
Individual muscle fibers obey the all-or-none law. |
| | A) | True |
| | B) | False |
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| 11 | |
Creatine phosphate is used to regenerate ATP in muscle fibers. |
| | A) | True |
| | B) | False |
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| 12 | |
The muscle that does most of the work in a group of muscles working together is called the synergist. |
| | A) | True |
| | B) | False |
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| 13 | |
Recruitment results in ____________ . |
| | A) | atrophy |
| | B) | stronger and stronger muscle contractions |
| | C) | all-or-none |
| | D) | innervation |
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| 14 | |
A ________ is divided into three stages: the latent period, the contraction period, and the relaxation period. |
| | A) | muscle twitch |
| | B) | myogram |
| | C) | summation |
| | D) | motor unit |
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| 15 | |
Which fatigue quickly, slow twitch fibers or fast twitch fibers? |
| | A) | slow |
| | B) | fast |
| | C) | fatigue at same rate |
| | D) | they do not fatigue |
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| 16 | |
The tibialis anterior is named according to |
| | A) | size |
| | B) | shape |
| | C) | direction of fibers |
| | D) | location |
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| 17 | |
Chronic pain characterized by achy pains, tenderness, stiffness of muscles, and substance P found in the blood stream describes the condition called _________. |
| | A) | cancer |
| | B) | diabetes |
| | C) | fibromyalgia |
| | D) | tetanus |
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