Norepinephrine or noradrenaline is a catecholamine that in the human body acts as a hormone and neurotransmitter. As a neurotransmitter, it has a critical role in the regulation of the heart rate. As a hormone, it complements adrenaline. affecting the amygdala, increasing heart rate, triggering the release of glucose into the bloodstream and increasing blood flow into skeletal muscles.

As a pharmaceutical, norepinephrine is used to raise blood pressure,

Norepinephrine at Wikipedia

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