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( Norepinephrine)
L 216.5–218 °C (decomp.)
D/L 191 °C (decomp.) As a stress hormone, norepinephrine affects parts of the brain where attention and responding actions are controlled. Along with epinephrine, norepinephrine also underlies the fight-or-flight response, directly increasing heart rate, triggering the release of glucose from energy stores, and increasing blood flow to skeletal muscle. However, when norepinephrine acts as a drug it will increase blood pressure by its prominent increasing effects on the vascular tone from a-adrenergic receptor activation. The resulting increase in vascular resistance triggers a compensatory reflex that overcomes its direct stimulatory effects on the heart, called the baroreceptor reflex, which results in a drop in heart rate called reflex bradycardia. Norepinephrine is synthesized from dopamine by dopamine ß-hydroxylase.[3] It is released from the adrenal medulla into the blood as a hormone, and is also a neurotransmitter in the central nervous system and sympathetic nervous system where it is released from noradrenergic neurons. The actions of norepinephrine are carried out via the binding to adrenergic receptors.
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Norepinephrine Subcategories
Norepinephrine Articles
Green Tea For Weight Loss by Jess Ba-ad
Green tea can aid your weight loss goals if you have any. What is good about green tea is that it has no side effects and brings you many health benefits not to mention disease prevention because of its antioxidant properties.
Among the diffe...
Understanding Bipolar Disorder by Anne Wolski
Copyright 2006 Anne Wolski
Bipolar disorder, once known as manic depression, is an illness where the sufferer alternatively experiences both extreme joy and terrible desolation. Medication and therapy are generally used to stabilize the conditi...
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