A muscle contracts in response to an electrical signal that signals the ______________, the unit of contraction, to shorten.

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asked Feb 20, 2022 158k views

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Emeka Augustine · Answer 1 · 2022-02-25T02:40:50+0000

Answer:

Sarcomere

Step-by-step explanation:

A sarcomere is the basic contractile unit of muscle fiber. Each sarcomere is composed of two main protein filaments—actin and myosin—which are the active structures responsible for muscular contraction.

A muscle contracts in response to an electrical signal that signals the ______________, the unit of contraction, to shorten.

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