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Epinephrine (also known as adrenaline) is a hormone and a neurotransmitter. It increases heart rate, constricts blood vessels, dilates air passages and participates in the fight-or-flight response of the sympathetic nervous system. Chemically, epinephrine is acatecholamine, a monoamine produced only by the adrenal glands from the amino acids phenylalanine and tyrosine.
For All Adrenalin Fans
The term adrenaline is derived from the Latin roots ad- and renes and literally

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