Which of the following neurotransmitters usually depolarizes postsynaptic neurons?
A) serotonin
B) dopamine
C) GABA
D) acetylcholine
E) monoamine oxidase

Question

Quizplus · Accepted Answer

Acetylcholine exerts an excitatory effect on most postsynaptic neurons by depolarizing their membrane. This makes it the best choice out of the options given. Serotonin and GABA have inhibitory effects, while dopamine can be either excitatory or inhibitory depending on the receptor subtype it activates. Monoamine oxidase is an enzyme that breaks down neurotransmitters and is not a neurotransmitter itself.

Which of the Following Neurotransmitters Usually Depolarizes Postsynaptic Neurons