An agonist
A) blocks the action of neurotransmitters.
B) prevents reuptake of neurotransmitters.
C) mimics the action of a neurotransmitter.
D) extends the absolute refractory period of neural transmission.

Question

Quizplus · Accepted Answer

An agonist is a substance that mimics the action of a neurotransmitter. It binds to the receptor sites on the postsynaptic membrane and activates them, causing a response similar to that of the actual neurotransmitter. Examples of agonists include drugs such as nicotine, which mimics the action of acetylcholine, and morphine, which mimics the action of endorphins.

An Agonist