norepinephrine


nor·epi·neph·rine

noun \ˈnr-ˌe-pə-ˈne-frən\

Definition of NOREPINEPHRINE

:  a monoamine C8H11NO3 that is a neurotransmitter in postganglionic neurons of the sympathetic nervous system and in some parts of the central nervous system, is a vasopressor hormone of the adrenal medulla, and is a precursor of epinephrine in its major biosynthetic pathway

First Known Use of NOREPINEPHRINE

1945

nor·epi·neph·rine

noun \ˌnr-ˌep-ə-ˈnef-rən, -rēn\   (Medical Dictionary)

Medical Definition of NOREPINEPHRINE

: a catecholamine C8H11NO3 that is the chemical means of transmission across synapses in postganglionic neurons of the sympathetic nervous system and in some parts of the central nervous system, is a vasopressor hormone of the adrenal medulla, and is a precursor of epinephrine in its major biosynthetic pathway—called also arterenol, noradrenaline; see levophed

norepinephrine

noun    (Concise Encyclopedia)

One of two catecholamine hormones (epinephrine is the other) secreted by the adrenal glands, as well as at nerve endings, as a neurotransmitter. It resembles adrenaline chemically and in its actions on the body, which mimic sympathetic nervous system stimulation. It constricts most blood vessels and is given for certain types of shock. Norepinephrine is formed from tyrosine and converted to epinephrine. It was discovered by Ulf von Euler-Chelpin (1905–83) in the mid-1940s.

Variants of NOREPINEPHRINE

norepinephrine or noradrenaline

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