Catecholamines

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Catecholamines

Family of neurotransmitters containing dopamine, norepinephrine and epinephrine, produced and secreted by cells of the adrenal medulla in the brain. Catecholamines have excitatory effects on smooth muscle cells of the vessels that supply blood to the skin and mucous membranes and have inhibitory effects on smooth muscle cells located in the wall of the gut, the bronchial tree of the lungs, and the vessels that supply blood to skeletal muscle. There are two different main types of receptors for these neurotransmitters, called alpha and beta adrenergic receptors. The catecholamines are therefore are also known as adrenergic neurotransmitters.

Mentioned in: Alpha 1 -Adrenergic Blockers

catecholamines (kaˈ·t

·kōˑ·l

·mēnz),

n.pl a group of substances derived from tyrosine that act as hormones to stimulate cellular activity and carry nerve impulses through the body.

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adrenergic receptor Alpha 1 -Adrenergic Blockers amine biogenic amine bisferiens pulse catechol-o-methyl transferase catecholamine catecholaminergic Catecholamines Tests Cool Down cyclic AMP cycloheximide Epi-Sick ganglioneuroma phentolamine test Stress Age Syndrome Stress-Induced Cardiomyopathy total catecholamine test tyramine tyramine hypertension			Patients with heart disease usually have higher levels of catecholamines - hormones that activate the beta-adrenergic receptors to stimulate cardiac muscle contraction. Beta-blockers for heart patients a double-edged sword by Asian News International A similar case reported in 1990 indicated that adrenal cortical adenomas causing clinical features of phaeochromocytoma and elevated 24 hour urinary catecholamines have been reported rarely and that patients with hypertension and on long term medication of beta blockers may have an increased urinary norepinephrine excretion (6). Adrenal carcinoma: a case study by Hemmady, Sujata / New Zealand Journal of Medical Laboratory Science In preparation for an emergency, a surge of catecholamines (a group of excitatory neurotransmitters that include epinephrine and norepinephrine) floods the bloodstream and increases one's heart rate and blood pressure in the process. Obstructive sleep apnea and aldosterone by Patrick, Regina / FOCUS: Journal for Respiratory Care & Sleep Medicine			Catastrophic Illness catastrophic limit catastrophic reaction catathymia catatonia Catatonic behavior catatonic excitement catatonic rigidity catatonic schizophrenia catatonic stupor catatricrotism Catatropis CATCH Catch-22 catch-up growth catching pens catchment catchment area catclaw catechin catechins catechol catechol-o-methyl transferase catecholamine catecholaminergic Catecholamines Catecholamines Tests catechu categoric data categoric variable categorical data categorization category Category A Biological Agent Category A Diseases Category A Drug Category B Biological Agent Category B Diseases Category B Drug Category C Biological Agent Category C Diseases Category C Drug Category D Drug Category X Drug caterpillar Caterpillar Cell Caterpillar Dermatitis caterpillar flap Caterpillar Hump Artery catfish catgut			catechizing catechizing catechol catechol catechol Catechol O Methyltransferase Catechol O-methyltransferase Catechol-O-methyl transferase Catechol-o-methyltransferase Catechol-Omicron-Methyltransferase catecholamine catecholamine catecholamine catecholamine Catecholamine Heart Muscle Disease Catecholamine hormone Catecholamine hormone Catecholamine hormone Catecholamine hormone Catecholamine plasma membrane transport proteins Catecholamine plasma membrane transport proteins Catecholamine plasma membrane transport proteins Catecholamine plasma membrane transport proteins catecholamine-depleting agents catecholamine-depleting agents catecholamine-depleting agents catecholamine-depleting agents catecholaminergic Catecholaminergic polymorphic ventricular tachycardia catecholaminergic receptor Catecholamines Catecholamines Tests Catecholborane Catechols Catechols Catechols catechu catechu catechu catechu Catechuic catechumen Catechumenate Catechumenical catechumenism Catechumenist Catechumens CATECS CATED Catedra Abierta Viktor E Frankl CATEEM CATEF categorem categorematic categoreme categorial categorial categorial categorial categorial Categorial grammar

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