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Catecholamines: Definition & Function


Catecholamine, any of various naturally occurring amines that function as neurotransmitters and hormones within the body. Catecholamines are characterized by a catechol group (a benzene ring with two hydroxyl groups) to which is attached an amine (nitrogen-containing) group.


Among the catecholamines are dopamine, epinephrine (adrenaline), and norepinephrine (noradrenaline).


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