In the case of somatic neuromuscular neurons, the arrival of a nerve impulse at the axon terminal immediately triggers ________.
A) a change in the permeability of the postsynaptic plasma membrane
B) the release of acetylcholine (ACh) at the presynaptic membrane
C) the generation of an action potential in the axon
D) long-lived effects at the synaptic membrane
E) an action potential

Question

Quizplus · Accepted Answer

The arrival of a nerve impulse at the axon terminal triggers the release of the neurotransmitter acetylcholine (ACh) at the presynaptic membrane in somatic neuromuscular neurons. This ACh then binds to receptors on the postsynaptic plasma membrane, causing a change in membrane permeability and ultimately leading to an action potential in the muscle fiber.

In the Case of Somatic Neuromuscular Neurons, the Arrival of a Nerve