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27 Cards in this Set
- Front
- Back
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is cardiac muscle voluntary or involuntary?
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involuntary.
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people who have a predominance of type II fibersin their leg muscles tend to be better at aerobic endurance activities than people people who have a higher % of type I fibers. True or false?
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false
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T or F. the difference in the size of motor units means that when a single type I alpha neuron stimulates its fibers, far more muscle fibers contract than when a single type II alpha neuron stimulates its fibers.
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false
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myosin ATPase is the enzyme that splits ATP to release energy for driving contraction, it does not help to facilitate relaxation. T or F?
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false
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where is skelatal muscle found?
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the skeleton only
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what does the joint angle do in an isometric or static contraction?
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the joint remains the same however, the muscle itself acts
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is smooth muscle voluntary or involuntary?
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involuntary
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executing a movement in a slow eccentric contraction helps increase force production. T or F?
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false
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Type IIA fibers are the most recruited muscle fibers. T or F?
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false
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what is the most frequently common recruited muscle fiber?
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type 1
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type II fibers generate more force than type I fibers. T or F?
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true
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a single electrical stimulus is called a ?
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twitch
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a series of three electrical stimuli are called ?
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summation
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a constant electrical stimuli is called ?
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tetanus
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in concentric contractions,....
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the muscle shortens
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type II fibers have a more developed sarcoplasmic reticulum. T or F?
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true
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type II fibers have a ____ form of ATPase.
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fast
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due to a fast form of ATPase in type II fibers, ATP is split more rapidly in type II than type I. T or F?
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true
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in eccentric contractions...
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the muscle lengthens
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what kind of fibers are found in skeletal muscles?
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type I and II
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What fibers take longer to reach peak tension?
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type I
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What fiber contains a slow form of myosin ATPase?
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Type 1
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What fiber has a more highly developed S.R.?
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type II
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what fiber has a motor neuron with a small cell body and can innervate a cluster of 10-180 muscle fibers?
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type 1
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what fiber has a fast form of ATPase?
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type 2
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what fiber generates more force and reaches peak tension faster?
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type 2
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what fiber has 3 subtypes?
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type 2
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