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New page: '''Epinephrine''', also known as '''adrenaline''', is a hormone. It's name comes from the Greek phrase ''epi'' ''nephros'', meaning "from the kidney", whereas "adrenaline" comes fr...
'''Epinephrine''', also known as '''adrenaline''', is a [[hormone]]. It's name comes from the [[Greek]] phrase ''epi'' ''nephros'', meaning "from the kidney", whereas "adrenaline" comes from the [[Latin]] phrase ''ad'' ''renal'', which means the same thing. It is secreted by the [[adrenal gland]]s. Epinephrine is released during the [[fight or flight]] reaction, causing the body to shift into "overdrive". The [[pupil]]s dilate, [[blood vessel]]s constrict, and the [[immune system]] weakens, along with other changes.