PHYSL212 Study Guide - Lippincott Williams & Wilkins, Respiratory System, Perfusion
13 Oct 2014
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Previously : respiratory system- general description of functions and structures, alveoli and respiratory membrane characteristics, respiratory muscles (pump, airway, accessory, mechanics of ventilation (how gas moves in and out the lungs) Medical physiology, w. boron (2nd edition) elsevier. Respiratory physiology, jb west (9th edition) lippincott williams & wilkins. Images reproduced in these slides have been included under ss. 29-29. 4 of the copyright act and their source(s) have been acknowledged. These slides have been made available for your own use, further distribution may infringe copyright. Diffusion: how gas gets across the blood-gas barrier: fick"s law. Gas molecules are constantly in motion and this motion exerts a pressure. P increases in response to anything that increases movement: temperature, concentration of gas, dalton"s law: in a mixture of gases (e. g. air), each gas operates independently. Thus, total pressure is the sum of individual pressures (partial pressures: ptotal = p1 + p2 + p3 + pn, for air, patm = pn2 + po2.
