Final answer:
Acetylcholinesterase is an enzyme that breaks down acetylcholine, a neurotransmitter, into choline and acetate. It is important in terminating nerve impulses and ensuring proper neuronal transmission.
Step-by-step explanation:
Acetylcholinesterase (AChE) is an enzyme that breaks down acetylcholine, a neurotransmitter, into choline and acetate. This enzyme plays a crucial role in terminating nerve impulses at synapses in the nervous system. By breaking down acetylcholine, acetylcholinesterase prevents continuous muscle contraction and allows for proper neuronal transmission.