in view of these findings , we propose that extra-cns catecholamine-producing tissues be termed the sympathochromaffin system consisting of two components : 1 ) the sympathetic nervous system that releases the neurotransmitter norepinephrine from its postganglionic neurons , and 2 ) the chromaffin tissues , including the adrenal medullae , that contain cells that secrete epinephrine , norepinephrine , or dopamine .
C0007412
catecholamine
C0013030
dopamine