norepinephrine

norepinephrine
/nawr'ep euh nef"rin, -reen/, n.
1. Also called noradrenaline. Physiol. a neurotransmitter, released by adrenergic nerve terminals in the autonomic and possibly the central nervous system, that has such effects as constricting blood vessels, raising blood pressure, and dilating bronchi.
2. Pharm. a commercial form of this substance used for emergency treatment of lowered blood pressure.
[1940-45; NOR- + EPINEPHRINE]

* * *

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.

* * *


Universalium. 2010.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • Norepinephrine — Norepinephrine[1] …   Wikipedia

  • norepinephrine — orepinephrine n. A hormone ({C8H11NO3}) secreted by the adrenal medulla; it also serves as a neurotransmitter, released at synapses; called also {noradrenaline}. Chemically it is 2 amino 1 (3,4 dihydroxyphenyl)ethanol. It is a precursor of… …   The Collaborative International Dictionary of English

  • norepinephrine — (n.) 1868, from NORMAL (Cf. normal) (in reference to molecular structure) + EPINEPHRINE (Cf. epinephrine) …   Etymology dictionary

  • norepinephrine — [nôr′ep΄ə nef′rin, nôr′ep΄ə nef′rēn΄] n. [see NOR ] a hormone or neurotransmitter, C8H11NO3, related to epinephrine, that is used medically to constrict blood vessels and to stop bleeding: it is secreted by the adrenal medulla or liberated at… …   English World dictionary

  • Norépinéphrine — Noradrénaline Noradrénaline Structure chimique de la noradrénaline Général …   Wikipédia en Français

  • norepinephrine — A chemical made by some nerve cells and in the adrenal gland. It can act as both a neurotransmitter (a chemical messenger used by nerve cells) and a hormone (a chemical that travels in the blood and controls the actions of other cells or organs) …   English dictionary of cancer terms

  • Norepinephrine reuptake inhibitor — Norepinephrine …   Wikipedia

  • Norepinephrine-dopamine reuptake inhibitor — Norepinephrine Dopamine …   Wikipedia

  • Norepinephrine releasing agent — Norepinephrine A norepinephrine releasing agent (NRA) is a type of drug which induces the release of norepinephrine and epinephrine from the pre synaptic neuron into the synapse. This in turn leads to increased extracellular concentrations of… …   Wikipedia

  • Norepinephrine bitartrate — is the bitartrate salt of epinephrine (two molecules of tartaric acid reacted with epinephrine to form a salt). Epinephrine is known also as adrenaline. It does not occur in this form naturally in the body (epinephrine is an endogenous compound… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”