Researchers Have Found That the Amino Acid Glycine

Researchers have found that the amino acid glycine:

A) competes with the effects of glutamate and, therefore, blocks those synapses.
B) can be converted into dopamine or serotonin in different brain areas.
C) increases the effectiveness of other antipsychotic drugs.
D) directly stimulates nicotinic-type acetylcholine synapses.