KINE 1P90 Lecture Notes - Lecture 19: Hemoglobin, Total Pressure, Partial Pressure
23 Mar 2016
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Document Summary
Pressure exerted by a single gas (o2, co2, n2) in air (a mixture of gases) Equals sum of pressure that each gas would exert independently. Parial pressure is usually denoted with a p . Parial pressure= % concentraion x total pressure of gas mixture. Air can"t move into body (goes from high to low pressure) N2 forced into blood stream and issue. If diver ascends too quickly nitrogen bubbles may form in blood (not enough ime to escape blood) Gas always difuses down its parial pressure gradient. Passive difusion of o2 down gradient (no acive transport) Having just returned from issues where o2 was delivered an co2 picked up. Oxygen has difused from lungs to blood. Blood is composed of plasma (luid) and blood cells. Amount of gas that dissolves in water is determined by its solubility in water and its parial pressure in the air. Oxygen needs to ind another way to be transported in blood.
