When an Action Potential from a Motor Neuron Arrives at the Neuromuscular

When an action potential from a motor neuron arrives at the neuromuscular junction NMJ) , a series of events occurs that leads to muscle contraction. Which of the following events will occur last i.e., after all of the others) ?

A) release of Ca⁺⁺ from the sarcoplasmic reticulum
B) depolarization of the muscle cell
C) ACh release
D) conformational change in troponin
E) action potential propagation down the T- tubules

Correct Answer:

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