Question

The neurotransmitter released from the motor neuron at a neuromuscular junction is

a) norepinephrine.
b) acetylcholine.
c) adrenaline.
d) calcium.
e) glycine.

Answer 1

The neurotransmitter released from the motor neuron at a neuromuscular junction is acetylcholine.

Step-by-step explanation:

The neurotransmitter released from the motor neuron at a neuromuscular junction is acetylcholine. Acetylcholine (ACh) is released when an action potential travels down the motor neuron's axon, resulting in an influx of calcium that allows synaptic vesicles to release ACh into the synaptic cleft. ACh then diffuses across the synaptic cleft to bind with ACh receptors on the motor end plate, triggering depolarization and the transmission of the nerve signal to the muscle fiber.

Answer 2

The answer is b) acetylcholine.

Step-by-step explanation:

Acetylcholine is an actylcholine that functions as a neurotransmitter, an ester of acetic acid and choline that serves as a vasodilator, a muscarinic agonist, a hormone, a human metabolite, a metabolite of a mouse and a neurotransmitter.