What happens to acetylcholine after it attaches to a receptor on the postsynaptic cell?
A) It is broken down into two components.
B) It is reabsorbed intact by the presynaptic cell.
C) It is metabolized by the postsynaptic cell as a source of energy.
D) It continues to stimulate the postsynaptic neuron until replaced by another neurotransmitter.

Question

Quizplus · Accepted Answer

Acetylcholine is broken down by the enzyme acetylcholinesterase into choline and acetate after it attaches to a receptor on the postsynaptic cell. This breakdown helps terminate the signal transmission from the presynaptic neuron to the postsynaptic neuron.

What Happens to Acetylcholine After It Attaches to a Receptor