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