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Epinephrine: Most people know epinephrine by its other name—adrenaline. ...
Norepinephrine: Also known as noradrenaline, this hormone works with epinephrine in responding to stress.
Epinephrine and norepinephrine are the two hormones secreted by the adrenal medulla. These adrenal hormones are classified as catecholamine's which are chemical compounds made in the body from the amino acid tyrosine.