process capable of inducing phenotype has_participant has participant vasoconstriction biological_process GO:0042310 A decrease in the diameter of blood vessels, especially arteries, due to constriction of smooth muscle cells that line the vessels, and usually causing an increase in blood pressure. Wikipedia:Vasoconstriction GO:0045908 negative regulation of blood vessel size blood vessel diameter maintenance Hypertension 5-hydroxytryptamine receptor 1A (human) sodium-dependent serotonin transporter (human) 5-hydroxytryptamine receptor 7 (human) 5-hydroxytryptamine receptor 2B (human)