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NORADRENALIN BITARTRATE
Norepinephrine () (abbreviated norepi or NE) or noradrenalin () (abbreviated NA
or NAd) is a with multiple roles including as a and a .
As a , norepinephrine affects parts of the brain where and responding actions
are controlled. Along with , norepinephrine also underlies the , directly
increasing , triggering the release of from energy stores, and increasing blood
flow to . Norepinephrine also has a neurotransmitter role when released
diffusely in the brain as an agent.
When norepinephrine acts as a it increases by increasing vascular tone through
activation. The resulting increase in vascular resistance triggers a
compensatory that overcomes its direct stimulatory effects on the heart, called
the , which results in a drop in heart rate called .
Norepinephrine is synthesized from by . It is released from the into the blood
as a , and is also a in the and where it is released from noradrenergic . The
actions of norepinephrine are carried out via the binding to .