material for the second adaptations exam
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is reversal of muscle action? | when the origin moves toward the insertion
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| what is the definition of normal resting length? | the length of a muscle when unstimulated & no forces or stresses are placed upon it
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| the definition of muscle irritability | the ability to respond to stimulus
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| definition of contractility | ability to shorten or contract when it receives adequate stimulation
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| definition of extensibility | the ability of a muscle to lengthen or stretch when force is applied
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| definition of elasticity | ability to recoil or return to normal resting length when stretching or shortening force is removed
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| definition of tension | force built up within a muscle
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| passive tension | involves the noncontractile units of a muscle, builds when muscle is stretche
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| active tension | comes from contractile units, can be compared to releasing end of stretched rubber band
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| total tension of muscle | a combination of active and passive tension
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| Tone | the state of readiness of a muscle, slight tension always present in muscle
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| excursion | the distance from max elongation to max shortening (usually 50% longer than muscle at rest)
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| active insufficiency | the point where a muscle cannot shorten any farther, occurs in the agonist (contracting muscle)
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| passive insufficiency | occurs when muscle cannot be elongated any farther without damaging fibers. occurs to the antagonist
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| tenodesis | the functional use of passive insuficiency - eg hand: fingers exten with wrist is flexed, flex when wrist extends
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Created by:
sherryama
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