The signal to excite a muscle cell must cross the neuromuscular junction by the diffusion of acetylcholine across the
A) motor neuron axon.
B) synaptic cleft.
C) sarcolemma.
D) synaptic vesicles.
E) myofibril.

Question

Quizplus · Accepted Answer

The neuromuscular junction is the synapse between a motor neuron and a muscle cell. The signal crosses this junction by the diffusion of the neurotransmitter acetylcholine across the synaptic cleft, which is the gap between the neuron and the muscle cell.

The Signal to Excite a Muscle Cell Must Cross the Neuromuscular