The Activity of Acetylcholine in a Synapse is Terminated By

Question

The activity of acetylcholine in a synapse is terminated by
A)its active transport across the presynaptic membrane.
B)its diffusion across the presynaptic membrane.
C)its active transport across the postsynaptic membrane.
D)its diffusion across the postsynaptic membrane.
E)its degradation by a hydrolytic enzyme on the postsynaptic membrane.

Accepted Answer

Acetylcholine is terminated by its degradation by a hydrolytic enzyme called acetylcholinesterase, which is found on the postsynaptic membrane. This ensures that the signal is only transmitted once and prevents excessive stimulation.