BIO SCI E182 Lecture Notes - Venous Blood, Cellular Respiration, Pulmonary Artery

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Nitric oxide: vasodilator important for propping open tiny vessels; levels decline as blood is stored in blood banks. +it is one of many factors that will affect how the rbcs carry oxygen. Partial pressure of a gas in a liquid is defined as the partial pressure of that same gas in the gas phase at equilibrium. Example: start with water with 0 partial pressure of oxygen (in equilibrium with a gas sample that has no oxygen in it whatsoever) and then bring it into contact with some oxygen gas. +result: the oxygen gas will dissolve in the water. +at equilibrium, the partial pressure of the oxygen gas in the air and in the water is equal. Low oxygen solubility means concentrations are not equal. +the oxygen concentration in both the liquid and the gas, however, is different. Carbon dioxide is 20 times more soluble in water. [gas] in solution = (solubility of gas)(p gas)

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