PHYSIOLOGY
SKELETAL MUSCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Graded responses can be produced by changing ____
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frequency of muscle contraction
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number of muscle cells being stimulated at one time
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duration of muscle contraction
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None of the above
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Explanation:
Detailed explanation-1: -Stimulation of the muscle fibre, causes a wave of depolarisation to pass down the t-tubule, and the SR to release calcium ions into the sarcoplasm. Calcium is pumped back up into the SR to lower calcium ion concentration in the sarcoplasm, to relax the muscle (turn off contraction).
Detailed explanation-2: -Skeletal muscles respond to a single electric shock of sufficient magnitude by rapid, intense contractions called phasic contractions.
There is 1 question to complete.