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Steps of Muscle Contraction

9. Muscle Tissue / Steps of Muscle Contraction / Problem 1

During action potential, the excitation-induced release of calcium ions from the sarcoplasmic reticulum is triggered by :

A

An increase in intracellular sodium levels

B

An increase in ATP production

C

The binding of acetylcholine to muscle receptors

D

The depolarization of the T-tubules

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