Question

What is the role of acetylcholinesterase at a synapse?

Answer 1

To stop the flow of acetylcholine.

Explanation:

The neurotransmitter acetylcholine is released when, for example, you move a joint, such as when you bend your arm. If the flow of acetylcholine was allowed to continue, then you would not be able to bend your arm back into its original position.

Acetylcholine esterase cancels this flow, and allows you to bend your arm back into its original position.