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.

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 — noun Date: 1945 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… …   New Collegiate Dictionary

  • norepinephrine — See noradrenaline …   Dictionary of molecular biology

  • norepinephrine — noun A neurotransmitter found in the locus coeruleus which is synthesized from dopamine. Syn: noradrenaline See Also: epinephrine …   Wiktionary

  • norepinephrine — l (−) α (aminomethyl) 3,4 dihydroxybenzyl alcohol; a catecholamine hormone of which the natural form is d, although the l form has some activity; the base is considered to be the postganglionic adrenergic mediator, acting on α and β receptors; it …   Medical dictionary

Share the article and excerpts

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

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.