Question

a&p flix quiz: events at the neuromuscular junction 6 parts -- of 1 point action potential propagation in a skeletal muscle fiber ceases when acetylcholine is removed from the synaptic cleft. which of the following mechanisms ensures a rapid and efficient removal of acetylcholine? acetylcholine is degraded by acetylcholinesterase. acetylcholine diffuses away from the cleft. acetylcholine is transported back into the axon terminal by a reuptake mechanism. acetylcholine is transported into the postsynaptic neuron by receptor - mediated endocytosis.

Explanation:

Acetylcholinesterase is an enzyme located in the synaptic cleft that rapidly breaks down acetylcholine, ensuring a quick and efficient removal of the neurotransmitter to terminate the signal at the neuromuscular junction. Diffusion is a slower process, and re - uptake or endocytosis mechanisms are not the primary way acetylcholine is removed at the neuromuscular junction.

Answer:

Acetylcholine is degraded by acetylcholinesterase.