Which of the Following is an Event That Occurs Within

Question

Which of the following is an event that occurs within the neuromuscular junction?
A) Sliding of actin and myosin
B) Pumping of calcium back into the SR
C) Binding of the acetylcholine to the nicotinic receptor on the muscle membrane
D) Release of calcium from the sarcoplasmic reticulum

Accepted Answer

The binding of acetylcholine to the nicotinic receptor on the muscle membrane is the event that occurs within the neuromuscular junction. This binding initiates a depolarization of the muscle cell membrane, leading to the release of calcium from the sarcoplasmic reticulum and the sliding of actin and myosin. Pumping of calcium back into the SR occurs after muscle contraction is complete.