dopamine vs. serotonin

dopamine

[doh-puh-meen] / ˈdoʊ pəˌmin /

noun

Biochemistry. a catecholamine neurotransmitter in the central nervous system, retina, and sympathetic ganglia, acting within the brain to help regulate movement and emotion: its depletion may cause Parkinson's disease.
Pharmacology. a dopamine preparation used to increase the force of contraction of the heart in the treatment of shock.

serotonin

[ser-uh-toh-nin, seer-] / ˌsɛr əˈtoʊ nɪn, ˌsɪər- /

Biochemistry.

a neurotransmitter, derived from tryptophan, that is involved in sleep, depression, memory, and other neurological processes.