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stich3 [128]
3 years ago
6

When the current reached the following stages, what proportion of fibers in the muscle were contracting? a) at threshold b) at t

he maximal stimulus c) above the maximal stimulus
Biology
1 answer:
lawyer [7]3 years ago
4 0

Answer:

A) few  B) 100% c) 100%

Explanation:

Muscle responds a stimulus which is capable of  generating action potential. Muscle response is in a way of "ALL or NONE". Muscle response to greater stimulus by recruiting more muscle fibers.

A) At threshold there would be only a small proportion of muscle is contracting.

B) At maximal stimulus the maximum number (100%) of recruitable fibers are contrating.

C) The number of recruitable fibers can't increase above maximal stimulus because already the maximum number of recruitable fibers are contracting.

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