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BookmarkEpinephrine (INN), also epinephrin (both pronounced ep-i-NEF-rin), or adrenaline (BAN) is a hormone and a neurotransmitter.
Epinephrine is sometimes shortened to epi in medical jargon.
Epinephrine plays a central role in the short-term stress reactions: the physiological response to threatening or exciting conditions (see fight-or-flight response)..
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