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Norepinephrine: A catecholamine hormone that functions as a neurotransmitter in the sympathetic nervous system, producing alpha-adrenergic (vasoconstriction) and beta(1)-adrenergic stimulation (increase myocardial contractility, heart rate, automaticity, and AV conduction), and beta(2)-adrenergic activity (peripheral vasodilation).(NCI)
Source: Diseases Database
Norepinephrine : levarterenol is norepinephrine bitartrate, a drug given as a vasoconstrictor.
Norepinephrine: Norepinephrine is one of a variety of catecholamines, which are hormone and neurotransmitter chemicals produced by the adrenal medulla. Norepinephrine plays a role in the sympathetic nervous system. In this role, its effects include increasing the heart rate, increasing blood pressure, and vascoconstricting the skin and viscera. These effects maximize the amount of oxygen and energy that is available to the muscles and lungs in order for the body to best respond physically to stressful situations. This is commonly known as the fight or flight response.
Norepinephrine also has other effects, including increasing alertness and contributing to a reflexive drop in heart rate in certain circumstances. Secretion of norepinephrine is stimulated by the hypothalamus. Conditions that can afflict epinephrine include pheochromocytoma, adrenal tumors, adrenal cancer, and trauma.
The following organs are closely related to the organ: Norepinephrine:
The following conditions are related to the organ: Norepinephrine:
These symptoms are related to afflictions of the organ: Norepinephrine:
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