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)?

Question

Quizplus · Accepted Answer

The conformational change in troponin occurs last in the series of events that lead to muscle contraction. This change is triggered by the release of Ca²⁺ from the sarcoplasmic reticulum, which allows tropomyosin to move out of the way and expose the myosin-binding sites on actin. This leads to the formation of cross-bridges between actin and myosin and ultimately muscle contraction. All of the other events listed occur before this conformational change in troponin.

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