Which of the following is an amino acid that operates at inhibitory synapses in the brain?
A)acetylcholine
B)epinephrine
C)endorphin
D)serotonin
E)GABA

Question

Quizplus · Accepted Answer

GABA (gamma-aminobutyric acid) is an amino acid that operates at inhibitory synapses in the brain. It works to decrease neuronal activity and create a calming effect. Options A, B, C and D are neurotransmitters but not amino acids, and they mainly operate in excitatory synapses or have various functions in the body.

Which of the Following Is an Amino Acid That Operates