BIOL-242 Lecture Notes - Lecture 33: Partial Pressure, Total Pressure, Red Blood Cell

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Chapter 22 part 5 | properties of gases, partial pressure. Basic properties of gases: dalton"s law of partial pressures. Total pressure exerted by mixture of gases = sum of pressures exerted by each gas. Pressure exerted by each gas in mixture. Directly proportional to its percentage in mixture. Each gas dissolves in proportion to its partial pressure. At equilibrium, partial pressures in two phases will be equal. Amount of each gas that will dissolve depends on. Solubility // co2 20 times more soluble in water than o2; little n2 dissolves in water. Temperature // as temperature rises, solubility decreases. Alveoli contain more co2 and water vapor than atmospheric air. Mixing of alveolar gas with each breath. We inhale that has pressure of 160 mm hg. In the alveoli of lungs, the pressure is 104 mm. The external respiration is about 40 mm hg. Oxygen will come into lungs and enter into blood stream.

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