IMG_0002_NEW_0005 - air and pulmonary capillary blood....

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Ambient air vs. tracheal air vs. alveolar air - partial plessule differences The functional residual capacity serves as a damper so that each incoming breath of air has only,a small effect on the.composition of the alveolar air ) partial pressure of gases in the alveoli remains relatively stable' B. Parti?l Pressure of Gases in a Liquid(Blood) Henry's Law - the amount of gas that dissolves in a fluid is a function of two factors: (1) The pressure of the gas above the fluid, which is given by the gas concentration times the barometric Pressure (2) The solubility coefficient of the gas - CO2 is 20.3 times more soluble in water than Oz. C. Lune Diffusing CaPacitY Diffusing capacity for oxygen - the volume of oxygen that crosses the alveolar- capillary-membrane per minute per millimeter mercury pressure between the alveolar
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Unformatted text preview: air and pulmonary capillary blood. Besides partial pressure gradients, diffusing capacity can be affected by other factors: l. The thickness of the membrane -of the diffusion Diftusing @ictiGlungTiseases such as pulmonary' 2. The number of red blPqd celq bin concentration because una Or does not exert a partial pressure' 3. The surface area of the respiratory membrane available for diffusion - diffusing-Diffusing capacity can increase up to three times resting values during heary aerobic exercise. Mechanisms: 1. Increased lung volumes during exercise --> increased surface area for diffusion 2. Opening up of more capillaries in the lung and greater volume of blood flowing through the lung. II. GAS TRANSPORT...
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This note was uploaded on 12/29/2011 for the course KIN 142 taught by Professor Asmundson during the Fall '09 term at Simon Fraser.

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