BIO 203 Lecture Notes - Lecture 9: Atrial Natriuretic Peptide, Adrenal Medulla, Renal Physiology
7 Aug 2018
School
Department
Course
Professor
Document Summary
Hormone: a chemical messenger secreted by a cell or group of cells (including neurons) into the blood for transport to a distant target, where it exerts its effects at very low concentrations. All hormones exert their effects by acting through receptors. Regulate the transport of molecules across membranes. Stimulate the synthesis of proteins or other regulatory molecules. Peptides: small series of amino acids: short chains of amino acids, include insulin, avp [arginine vasopressin, also known as antidiuretic hormone, angiotensin ii (renal physiology, anf [atrial natriuretic factor, acth [adrenocorticotropic hormone, largest class of hormones. Important property of peptide hormones is that their water soluble: blood is composed of plasma, which is mainly composed of water thus peptides are able to circulate easily (water soluble) Amine hormones: when the chromaphrine cell in the adrenal medulla, both epinephrine and norepinephrine are released in a 4 to 1 ratio.
