epinephrine(redirected from S-2)
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ep·i·neph·rinealso ep·i·neph·rin (ĕp′ə-nĕf′rĭn)
1. A hormone secreted by the adrenal medulla that is released into the bloodstream in response to physical or mental stress, as from fear or injury. It initiates many bodily responses, including the stimulation of heart action and an increase in blood pressure, metabolic rate, and blood glucose concentration. Also called adrenaline.
2. A white to brownish crystalline compound, C9H13NO3, isolated from the adrenal glands of certain mammals or synthesized and used in medicine as a heart stimulant, vasoconstrictor, and bronchial relaxant.
epinephrine(ˌɛpɪˈnɛfrɪn; -riːn) or
(Biochemistry) a US name for adrenaline
[C19: from epi- + nephro- + -ine2]
or ep•i•neph•rin(ˌɛp əˈnɛf rɪn)
1. a hormone secreted by the adrenal medulla upon stimulation by the central nervous system in response to stress, as anger or fear, and acting to increase heart rate, blood pressure, cardiac output, and carbohydrate metabolism.
2. a commercial preparation of this substance, used chiefly as a heart stimulant and antiasthmatic.Also called adrenaline.
A hormone secreted by the adrenal gland in response to physical or mental stress, as from fear. The release of epinephrine causes the heart to beat faster and more strongly, the pupils to dilate, and the rate of breathing to increase. Epinephrine also causes an increase in the amount of sugar in the blood, which can be used by the body as fuel when more alertness or greater physical effort is needed. Also called adrenaline.
(or adrenaline) A hormone produced by the adrenal glands to prepare the body for “fight or flight” in conditions of stress.
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|Noun||1.||epinephrine - a catecholamine secreted by the adrenal medulla in response to stress (trade name Adrenalin); stimulates autonomic nerve action|
pressor, vasoconstrictive, vasoconstrictor - any agent that causes a narrowing of an opening of a blood vessel: cold or stress or nicotine or epinephrine or norepinephrine or angiotensin or vasopressin or certain drugs; maintains or increases blood pressure
endocrine, hormone, internal secretion - the secretion of an endocrine gland that is transmitted by the blood to the tissue on which it has a specific effect
neurotransmitter - a neurochemical that transmits nerve impulses across a synapse
catecholamine - any of a group of chemicals including epinephrine and norepinephrine that are produced in the medulla of the adrenal gland