Which statement is true regarding muscle contraction? Contraction of cardiac mus

Question

Which statement is true regarding muscle contraction?

Contraction of cardiac muscle results from lengthening of sarcomeres.

Calcium removal from the cytoplasm causes contraction.

Calcium entry into the cytoplasm causes relaxation.

Cardiac myocytes are terminally differentiated.

Contraction of cardiac muscle results from lengthening of sarcomeres.

Calcium removal from the cytoplasm causes contraction.

Calcium entry into the cytoplasm causes relaxation.

Cardiac myocytes are terminally differentiated.

Explanation / Answer

Correct answer:- (D) Cardiac myocytes are terminally differentiated.

Explanation:- (A) contraction of cardiac muscle results from shortening of sarcomeres..so it is wrong.

(B) Calcium entry causes contraction.

(C) calcium removal causes relaxation.

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