Question

what is the most common inhibitory neurotransmitter in the brain?
multiple choice
γ-aminobutyric acid (gaba)
noradrenaline
epinephrine
acetylcholine
norepinephrine

Explanation:

γ-Aminobutyric acid (GABA) is the most common inhibitory neurotransmitter in the brain. It works by reducing neuronal excitability throughout the nervous system. Noradrenaline (also known as norepinephrine) and epinephrine are more associated with the body's "fight - or - flight" response and have excitatory effects in many cases. Acetylcholine can be both excitatory and inhibitory depending on the receptor type and location, but it is not the most common inhibitory neurotransmitter in the brain.

Answer:

γ-Aminobutyric acid (GABA)