Question

which of the following is a major inhibitory neurotransmitter? a. acetylcholine b. glutamate c. norepinephrine d. gaba (gamma-aminobutyric acid) please select the best answer from the choices provided
a
b
c
d

Explanation:

• Option A: Acetylcholine is mainly involved in muscle movement, learning, and memory, and is not a major inhibitory neurotransmitter.
• Option B: Glutamate is a major excitatory neurotransmitter in the brain.
• Option C: Norepinephrine is involved in the body's "fight - or - flight" response and is an excitatory - like neurotransmitter in many cases.
• Option D: GABA (gamma - aminobutyric acid) is widely known as the major inhibitory neurotransmitter in the central nervous system, as it reduces the likelihood of a neuron firing an action potential.

Answer:

D. GABA (gamma - aminobutyric acid)