Topic 18: Hormones and the Endocrine System (Ch. 45)

a) Simple hormones derived from the amino acid tyrosine (ex: epinephrine) 2) Peptides and proteins. a) Long chains of amino acids (ex: oxytocin) B) Steroid based hormones. 1) Lipid-soluble hormones derived from cholesterol (ex: testosterone & estrogen) C) Eicosanoids. 1) Hormone-like substances derived from arachidonic acid which act only on cells ................
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