An eccentric contraction is described as
A. action potential frequency is high enough that no relaxation of muscle fibers occurs.
B. a muscle produces constant tension during contraction.
C. a muscle produces an increasing tension during contraction.
D. a muscle produces increasing tension as it shortens.
E. a muscle produces tension, but the length of the muscle is increasing.
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Question 2) Tetanus of muscles is described as
A. action potential frequency is high enough that no relaxation of muscle fibers occurs.
B. a muscle produces constant tension during contraction.
C. a muscle produces an increasing tension during contraction.
D. a muscle produces increasing tension as it shortens.
E. a muscle produces tension, but the length of the muscle is increasing.
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Question 3) A proper definition of muscle tone is
A. constant tension produced by muscles for long periods of time.
B. a feeling of well-being following exercise.
C. the ability of a muscle to maintain a contraction against an outside force.
D. muscles contracting together.
E. warm-up of muscle tissue.
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Question 4) Complete tetanus
A. is the time during which the tissue cannot respond again.
B. results in complete and incomplete tetanus.
C. is the condition in which the muscle fiber only partially relaxes between contractions.
D. is the condition in which stimuli occur so rapidly that there are no intervening relaxations.
E. is the constant tension produced by muscles for long periods of time.
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Question 5) Which of the following statements concerning types of muscle contractions is false?
A. In isometric contractions, the amount of tension produced by the muscle is constant.
B. In isotonic contractions, the muscle fibers shorten.
C. The contractile processes in isometric and isotonic contractions are the same.
D. Most skeletal muscle contractions are a combination of isometric and isotonic contractions.
E. In isotonic contractions, the amount of tension produced by the muscle fibers is constant during the contraction.
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Question 6) Movements of the body are usually smooth and occur at differing rates because
A. they are a mixture of isotonic and isometric contractions.
B. motor units contract out of phase at their own particular rates.
C. most muscle contractions closely resemble individual muscle twitches.
D. muscles of different sizes contract at different rates.
E. of the all or none principle.
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Question 7) Multiple wave summation
A. is a time during which the tissue cannot respond again.
B. results in complete and incomplete tetanus.
C. is a condition in which the muscle fiber only partially relaxes between contractions.
D. is a condition in which stimuli occur so rapidly that there are no intervening relaxations.
E. is a constant tension produced by muscles for long periods of time.
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Question 8) The refractory period
A. is the time during which the tissue cannot respond again.
B. results in complete and incomplete tetanus.
C. is the condition in which the muscle fiber only partially relaxes between contractions.
D. is the condition in which stimuli occur so rapidly that there are no intervening relaxations.
E. is the constant tension produced by muscles for long periods of time.
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Question 9) Incomplete tetanus
A. is the time during which the tissue cannot respond again.
B. results in complete and incomplete tetanus.
C. is the condition in which the muscle fiber only partially relaxes between contractions.
D. is the condition in which stimuli occur so rapidly that there are no intervening relaxations.
E. is the constant tension produced by muscles for long periods of time.
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Question 10) Muscle tone
A. is a time during which the tissue cannot respond again.
B. results in complete and incomplete tetanus.
C. is a condition in which the muscle fiber only partially relaxes between contractions.
D. is a condition in which stimuli occur so rapidly that there are no intervening relaxations.
E. is a constant tension produced by muscles for long periods of time.
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