BIOL 2652 Lecture 8: Chapter 27
Document Summary
Interstitial <> plasma (capillary exchange (peff): components. Metabolic: water created as by-product of metabolism (electron. Functions: control osmosis and regulate ph. Physiology of body fluids: regulation of fluid components. Water loss via urination, defecation, perspiration, and respiration. In kidneys: regulate amount lost in urine, aldosterone. Causes increased levels of na+, cl-, and mg+2 in body fluids and decreased levels of k+ In tissues: regulate storage/release of electrolytes from body tissues, calcitonin. Storage of ca+2 and po4-2 in bones and teeth: parathyroid hormone (pth) Release of ca2+ and po4-2 from bones and teeth: ph regulation. Based on relative amount of h+ and oh- present. <7 = acidic (more h+ than oh-) Buffer systems: convert strong acids or bases to weak ones, hcl > h+, cl, protein buffer. Excess h+ picked up by amine (nh2) group of amino acid. Cooh > coo-, h: hemoglobin/oxyhemoglobin buffer. Co2 in blood forms carbonic acid (h2co3) Respiration: regulate amount of carbonic acid in blood, decrease ph.
