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Physiology General physiology 1d6d9de0

All of the following are true about excitation-contraction coupling in skeletal muscle except that

A

Acetylcholine is released at the nerve terminal

B

Ca2+ is released from sarcoplasmic reticulum during contraction

C

Ca2+ is pumped back into sarcoplasmic reticulum during relaxation

D

Ca2+ binds to tropomyosin to initiate muscle contraction

High-Yield Explanation

Ca2+ binds to troponin C (not Tropomyosin) to initiate muscle contraction. Ref: Ganong&;s Review of Medical Physiology 26th edition Pgno: 105

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