Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A substance, C8H11NO3, both a hormone and neurotransmitter, secreted by the adrenal medulla and the nerve endings of the sympathetic nervous system to cause vasoconstriction and increases in heart rate, blood pressure, and the sugar level of the blood.
from the GNU version of the Collaborative International Dictionary of English.
- noun 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 epinephrine in the body.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun biochemistry A
neurotransmitter found in thelocus coeruleus which is synthesized fromdopamine .
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a catecholamine precursor of epinephrine that is secreted by the adrenal medulla and also released at synapses
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
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Examples
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This result is due to several factors: a direct release of norepinephrine from storage vesicles, the blockage of reuptake of norepinephrine once it has been released into the synaptic cleft and a decrease in norepinephrine metabolism due to inability of MAO to break down norepinephrine.
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According to a study conducted by Alec Roy, M.D. formerly at the National Institute on Alcohol Abuse and Alcoholism, norepinephrine is secreted under stress, arousal, or thrill, so pathological gamblers gamble to make up for their underdosage.
New morning ritual nathreee 2008
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Ondansetron, which indirectly blocks an adrenaline-like brain hormone called norepinephrine, appears to have fewer side effects than Inderal.
DROWNING ON DRY LAND 2008
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He then went on to study the release of norepinephrine from the adrenergic neurons in the ear artery by cholinergic agonists acting on prejunctional nicotinic receptors.
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Opiates also inhibit the production of a chemical messenger called norepinephrine, which is thought to enhance fear signals in the brain.
The Seattle Times 2010
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Opiates also inhibit the production of a chemical messenger called norepinephrine, which is thought to enhance fear signals in the brain.
The Seattle Times 2010
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When blood pressure could not be maintained with a dose of 20 µg per kilogram of body weight per minute for dopamine or a dose of 0.19 µg per kilogram per minute for norepinephrine, open-label norepinephrine, epinephrine, or vasopressin could be added.
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Opiates also inhibit the production of a chemical messenger called norepinephrine, which is thought to enhance fear signals in the brain.
NYT > Home Page 2010
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When blood pressure could not be maintained with a dose of 20 µg per kilogram of body weight per minute for dopamine or a dose of 0.19 µg per kilogram per minute for norepinephrine, open-label norepinephrine, epinephrine, or vasopressin could be added.
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When blood pressure could not be maintained with a dose of 20 µg per kilogram of body weight per minute for dopamine or a dose of 0.19 µg per kilogram per minute for norepinephrine, open-label norepinephrine, epinephrine, or vasopressin could be added.
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