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 (that is, after all of the others listed below) ?

A) acetylcholine (ACh) release
B) conformational change in troponin
C) depolarisation of the muscle cell
D) release of Ca²⁺ from the sarcoplasmic reticulum

Correct Answer:

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