Answer:
stops; monoamines.
Explanation:
Monoamines are biochemical substances derived from amino acids through the decarboxylation process. The main monoamines are catecholamines (namely dopamine, norepinephrine, epinephrine), originating from tyrosine; tryptamine-derived serotonin and histamine from histidine. All monoamines are directly related to emotional disturbances and can be blocked through REM sleep. This is because the onset of REM sleep prevents the release of these neurotransmitters called monoamines.
