norepinephrine

[ nawr-ep-uh-nef-rin, -reen ]

noun

1. Also called noradrenaline. Physiology. 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. Pharmacology. a commercial form of this substance used for emergency treatment of lowered blood pressure.

norepinephrine

/ ˌnɔːrɛpɪˈnɛfrɪn; -riːn /

noun

1. the US name for noradrenaline

norepinephrine

/ nôr′ĕp-ə-nĕf′rĭn /

1. A substance that acts both as a neurotransmitter and hormone, secreted in the central nervous system, at the nerve endings of the sympathetic nervous system, and by the adrenal gland. Norepinephrine is similar to epinephrine in its physiological effects but acts to regulate regular physiologic activity rather than being released in response to stress. Also called noradrenaline. Chemical formula: C 8 H 11 NO 3 .

Word History and Origins

Origin of norepinephrine¹

First recorded in 1940–45; nor- + epinephrine

Example Sentences

The researchers demonstrated the utility of ConVERGD by studying a previously unidentified subpopulation of norepinephrine neurons.

From Science Daily

They found that UV exposure raises norepinephrine levels, decreases leptin levels, and induces the browning of subcutaneous fat, thereby increasing energy expenditure.

From Science Daily

SNRIs — serotonin and norepinephrine reuptake inhibitors — are a common class of medication used in treatment.

From Seattle Times

"That's the major finding in this paper, and based on that finding, we are able to generate locus coeruleus norepinephrine neurons."

From Science Daily

Not only that, but the increased levels of the stress-related neurotransmitter norepinephrine in the brain also returned to normal.

From Science Daily