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Unformatted text preview: 1 Ch. 27 – Fluid, Electrolyte, and Acid-Base Balance • These notes are a brief overview of the main themes of Ch. 27 only • The information in these notes and in Ch. 27 is FYI only, and will not be fair game for the Final Exam • While Ch. 27 repeats a lot of information we have discussed during the past 9 months, it does a nice job of tying these topics together under the umbrella concept of homeostasis Fig. 27-3, p. 1015 Fluid (water) balance • Water gain must = water loss • Water ≈ 50-60% of our body weight • There are no active transporters for water molecules, just water channels (aquaporins) – “Water follows salt” by osmosis • Major players in the maintenance of fluid balance : the renin-angiotensin system, ADH, aldosterone, natriuretic peptides, baroreceptors in the heart and blood vessels, and the thirst center in the hypothalamus 2 Electrolyte balance • Electrolyte gain must = electrolyte loss • Electrolytes = ions released when soluble inorganic compounds dissociate; they can...
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This note was uploaded on 03/12/2012 for the course BIOL 253 taught by Professor Tonychennault during the Fall '11 term at Clark College.
- Fall '11