A neurotransmitter and stress hormone involved in alertness, arousal, attention, and the fight-or-flight response.
From 'nor-' (shortened from 'normal,' indicating structural relation) + 'epinephrine' from Greek 'epi' (upon) + 'nephros' (kidney).
Norepinephrine is your brain's wake-up call — it sharpens attention, boosts alertness, and kicks your body into high gear when danger strikes.
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