This cartoon depicts the serotonin synthesis, release, reuptake, and degradation, as well as the canonical roles of a subset of serotonin receptors. TPH = tryptophan hydroxylase. AADC = aromatic acid decarboxylase. VMAT = vesicular monoamine transporter. SERT = serotonin transporter. MAO = monoamine oxidase. 5HT1-7 = serotonin receptor subgroups (oval shape) and individual receptors (goblet shape). Figure created using Ingenuity Pathway Analysis (Qiagen, Valencia, CA).