What is released into the neuromuscular junction to produce a muscle contraction?
A)calcium
B)acetylcholine
C)potassium
D)sodium
E)chloride

Question

Quizplus · Accepted Answer

Acetylcholine is released from the presynaptic terminal of the motor neuron at the neuromuscular junction and binds to receptors on the postsynaptic membrane of the muscle fiber, causing depolarization and muscle contraction. Calcium is involved in the release of acetylcholine, but is not directly responsible for muscle contraction. Potassium, sodium, and chloride are all involved in generating the action potential in the muscle fiber, but are not released into the neuromuscular junction to produce contraction.

What Is Released into the Neuromuscular Junction to Produce a Muscle