These glands also produce norepinephrine
[DOC] [TLE] Understanding Our Adrenal System: Norepinephrine | Breaking ... [PAR]  [DOC] [TLE] Understanding Our Adrenal System: Norepinephrine | Breaking ... [PAR] It's technically a catecholamine, but it functions as a hormone and neurotransmitter and is produced by the adrenal gland, postganglionic neurons of the sympathetic nervous system, and part of the brain called the locus coerules.