In an isometric contraction, how can the muscle stay the same length when the mu

Question

In an isometric contraction, how can the muscle stay the same length when the muscle is contracting?

(A)Elastic elements of the muscle stretch in response to the contraction of the muscle, so that the muscle stays the same size despite shortening sarcomeres.

(B)The myosin heads detach from actin when they reach the desired length.

(C)Calcium stops entering the sarcoplasm when the desired length is reached.

(D)The muscle is not able to generate more (or the same amount) force than the load, preventing shortening of the muscle.

Answer can be more than one choice listed

Explanation / Answer

The answers are

Elastic elements of the muscle stretch in response to the contraction of the muscle, so that the muscle stays the same size despite shortening sarcomeres. (A)

The muscle is not able to generate more (or the same amount) force than the load, preventing shortening of the muscle. (D)

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