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norepinephrine - 5 dictionary results
nor⋅ep⋅i⋅neph⋅rine
[nawr-ep-uh-nef-rin, -reen] 
ɛp
–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. |
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Based on the Random House Dictionary, © Random House, Inc. 2009.
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Based on the Random House Dictionary, © Random House, Inc. 2009.
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Link To norepinephrine
| nor·ep·i·neph·rine (nôr'ěp-ə-něf'rĭn) n. 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. Also called noradrenaline. |
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Main Entry: nor·epi·neph·rine
Pronunciation: "nor-"ep-&-'nef-r&n, -rEn
Function: noun
: a catecholamineC8H11NO3 that is the chemical means of transmission across synapses in postganglionic neurons of the sympathetic nervous system and in some parts of the central nervoussystem, is a vasopressor hormone of the adrenal medulla, and is a precursor of epinephrine in its major biosynthetic pathway called also arterenol, noradrenaline; —see
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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norepinephrine nor·ep·i·neph·rine (nôr'ěp-ə-něf'rĭn)
n.
A substance, 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. Also called levarterenol, noradrenalin.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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| norepinephrine (nôr'ěp-ə-něf'rĭn) Pronunciation Key
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: C8H11NO3. |
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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