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Physiology General physiology 5b61bf6e

All of the following are true about excitation-contraction coupling except

A

Acetylcholine is released at the nerve terminal

B

Calcium is pumped back into the sarcoplasmic reticulum during relaxation

C

Calcium is released from sarcoplasmic reticulum during contraction.

D

Calcium binds to tropomyosin to initiate muscle contraction.

High-Yield Explanation

Calcium binds to troponin to initiate exitation contraction coupling Troponin is present attached to tropomyosine Ref:Guyton and Hall textbook of medical physiology 12th edition,page number:82,83,84

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