#serotonin

• Antidepressant — A medication, chemical substance, or treatment used to combat, alleviate, and prevent states of depression, anxiety disorders, and clinical episodes of deep sadness or apathy. As an adjective, it describes the structural therapeutic effect of a compound capable of regulating the concentration of neurotransmitters (serotonin, norepinephrine, dopamine) at the level of neuronal synapses within the central nervous system.
• Argentaffin — A structural property of certain biological cells, granules, or tissues to directly reduce silver salts from solutions and stain intensely brown or black, without requiring the addition of an external reducing agent. In a medical sense, the term specifically describes neuroendocrine cells within the gastrointestinal mucosa that synthesize and store serotonin, playing a key role in regulating motility.