Which one of the following does not act as a neurotransmitter?
Epinephrine
Norepinephrine
Cortisone
Acetylcholine
Correct answer: Cortisone
Solution
Cortisone is a corticosteroid hormone produced by the adrenal cortex, so it is not used as a neurotransmitter. Epinephrine, norepinephrine, and acetylcholine are all well-known neurotransmitters.