In the diagram,which of the labeled structures is an integral component of a neuromuscular junction?

Question

Quizplus · Accepted Answer

Structure B represents the synaptic cleft, which is the space between the motor neuron axon terminal and the muscle fiber. This is where the neurotransmitter (usually acetylcholine) is released from the motor neuron and binds to receptors on the muscle fiber, initiating a muscle contraction. Therefore, it is an integral component of a neuromuscular junction. Structures A, C, D, and E are not specifically associated with neuromuscular junctions.

In the Diagram,which of the Labeled Structures Is an Integral