Question

multiple choice question. where is acetylcholine (ach) synthesized? in the cytoplasm of the muscle fiber in the synaptic cleft in the cytoplasm of the motor neuron in the vesicles of the motor neuron need help? review these concept resources. rate your confidence to submit your answer. high medium low reading © 2025 mcgraw hill. all rights reserved.

Explanation:

Acetylcholine (ACh) is synthesized in the cytoplasm of the motor neuron from acetyl - CoA and choline, catalyzed by the enzyme choline acetyltransferase. It is then transported into synaptic vesicles. The muscle fiber is the target of ACh, not the site of synthesis. The synaptic cleft is the space between the neuron and the target cell and not a site of synthesis. Vesicles store ACh but do not synthesize it.

Answer:

In the cytoplasm of the motor neuron