define adrenergic
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- Adrenergic means working on adrenaline (epinephrine) or noradrenaline (norepinephrine). Adrenergic nervous system, a part of autonomic nervous system that uses epinephrine or norepinephrine as its neurotransmitter.
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- Noun. 1. beta-adrenergic blocking agent-any of various drugs used in treating hypertension or arrhythmia; decreases force and rate of heart contractions by blocking beta-adrenergic receptors of the autonomic nervous system. beta blocker, beta-adrenergic blocker, beta-blocking agent.
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- adrenergic receptor in Medicine. adrenergic receptor n. Any of several reactive components of effector tissues most of which are innervated by adrenergic postganglionic fibers of the sympathetic nervous system and are activated by norepinephrine, epinephrine, and various adrenergic drugs.
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alpha-blocker An adrenergic blocking agent which produces miosis and a slight reduction in intraocular pressure. It is used mainly to reverse the mydriatic effect of sympathomimetic drugs (e.g. phenylephrine hydrochloride), or even some antimuscarinic drugs (e.g. tropicamide). Common agents include dapiprazole and moxisylyte (thymoxamine). Syn. alpha-blocker. See sympatholytic drugs.
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Beta blocker Beta blockers are competitive antagonists that block the receptor sites for the endogenous catecholamines epinephrine (adrenaline) and norepinephrine (noradrenaline) on adrenergic beta receptors, of the sympathetic nervous system, which mediates the fight-or-flight response.
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adrenaline a hormone produced by the medulla of the adrenal glands; called also adrenaline. Its function is to aid in the regulation of the sympathetic branch of the autonomic nervous system.
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ephedrine an adrenergic alkaloid obtained from several species of the shrub Ephedra or produced synthetically; used as the hydrochloride as a bronchodilator, antiallergic, central nervous system stimulant, mydriatic, pressor agent, and for stimulation of the α-adrenergic receptors in the treatment of certain types of urinary incontinence.
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Beta-adrenergic agonist Beta-adrenergic agonists or Beta-agonists are medications that relax muscles of the airways, which widens the airways and results in easier breathing.They are a class of sympathomimetic agents which act upon the beta adrenoceptors. In general, pure beta-adrenergic agonists have the opposite function of beta blockers.ost agonists of the beta receptors are selective for one or more beta-adrenoreceptors. For example, patients with low heart rate are given beta agonist treatments that are more cardio-selective such as dobutamine, which increases the force of contraction of the heart muscle.
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Alpha 1 -Adrenergic Blockers Alpha blockers — Medications that bind alpha adrenergic receptors and decrease the workload of the heart and lower blood pressure.They are commonly used to treat hypertension, peripheral vascular disease, and hyperplasia.igh blood pressure puts a strain on the heart and the arteries. Over time, hypertension can damage the blood vessels to the point of causing stroke, heart failure or kidney failure. People with high blood pressure may also be at higher risk for heart attacks.
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- Adrenergic drugs are also called adrenergic amines or sympathomimetic drugs. They are medicines that work by stimulating the sympathetic nervous system (SNS) . The SNS is part of the automatic nervous system (ANS).It helps to regulate your body’s reaction to stress or an emergency.drenergic drugs stimulate the same nerves by either mimicking the action of the neurotransmitter norepinephrine or stimulating its release. They are used for many life-threatening conditions. These include cardiac arrest, shock, or opening the airways during an asthma attack or allergic reaction.
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CATECHOLAMINE adrenaline-a catecholamine secreted by the adrenal medulla in response to stress (trade name Adrenalin); stimulates autonomic nerve action.
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What is Adrenergic? Adrenergic is a term used to describe proteins and drugs that interact with adrenaline or noradrenaline, also known as epinephrine and norepinephrine, respectively.
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agonist 1. in physiology a muscle which in contracting to move a part is opposed by another muscle (the antagonist). 2. in pharmacology, a drug which has affinity for the cellular receptors of another drug or natural substance and which produces a physiological effect. adrenergic agonist (2) see adrenergic agents.
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adrenaline a hormone produced by the adrenal medulla; called also adrenaline (British). Its function is to aid in the regulation of the sympathetic branch of the autonomic nervous system.
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Natural Beta Blockers for Anxiety Beta blockers, also known as beta-adrenergic blocking agents, are drugs that block norepinephrine and epinephrine (adrenaline) from binding to beta receptors on nerves.eta blockers, also known as beta-adrenergic blocking agents, are drugs that block norepinephrine and epinephrine (adrenaline) from binding to beta receptors on nerves.
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receptor There are two types, alpha-adrenergic receptors and beta-adrenergic receptors. alpha r's (alpha-adrenergic r's) adrenergic receptors found in cardiac muscle and vascular smooth muscle; they are stimulated by norepinephrine and blocked by agents such as phenoxybenzamine.
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beta-adrenergic blocking agent beta-adrenergic blocking agent (beta-blocker) any of a group of drugs that block the action of epinephrine at beta-adrenergic receptors on cells of effector organs.
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- ad·re·nal. adj. 1. At, near, or on the kidneys. 2. Of or relating to the adrenal glands or their secretions. n. An adrenal gland. [ ad- + renal .]. ad·re′nal·ly adv.
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norepinephrine norepinephrine (NE). [nor′nôr′epinef]. rin an adrenergic (hormone) catecholamine that acts to increase blood pressure by vasoconstriction but does not affect cardiac. Output it is synthesized by the adrenal, medulla the peripheral sympathetic, nerves and the central nervous. system
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Adrenergic Agonists 1. Direct-acting agonists: These drugs act directly on α or β receptors, producing effects similar to those that occur following stimulation of sympathetic nerves or release of the hormone epinephrine from the adrenal medulla. Figure: Sites of action of direct-, indirect-, and mixed-acting adrenergic agonists.
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ADRENAL GLAND adrenal - either of a pair of complex endocrine glands situated near the kidney. adrenal gland, suprarenal gland. ductless gland, endocrine gland, endocrine - any of the glands of the endocrine system that secrete hormones directly into the bloodstream.
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- There are two main groups of adrenergic receptors, α and β, with several subtypes. 1  α receptors have the subtypes α1 (a Gq coupled receptor) and α2 (a Gi coupled receptor). Phenylephrine is a selective agonist of the α receptor. 2  β receptors have the subtypes β1, β2 and β3.
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Adrenergic Adrenergic nervous system, a part of autonomic nervous system that uses epinephrine or norepinephrine as its neurotransmitter Regarding proteins: Adrenergic receptor
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lethargic lethargic - deficient in alertness or activity; bullfrogs became lethargic with the first cold nights. unenrgetic. inactive - not active physically or mentally; illness forced him to live an inactive life; dreamy and inactive by nature. energetic - possessing or exerting or displaying energy; an energetic fund raiser for the college; an energetic group of hikers; it caused an energetic chemical reaction.
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adrenergic adrenergic (ad´rinur´jik), adj 1. transmitted by norepinephrine or activated by norepinephrine or the other sympathomimetic agents. n 2. a term applied to nerve fibers that liberate epinephrine or norepinephrine at a synapse when a nerve impulse passes. n 3. a drug that mimics the action of adrenergic nerves.
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Adrenergic agonist Adrenergic agonist. An adrenergic agonist is a drug that stimulates a response from the adrenergic receptors. The five main categories of adrenergic receptors are: α1, α2, β1, β2, and β3, although there are more subtypes, and agonists vary in specificity between these receptors, and may be classified respectively.