BIOC39H3 Study Guide - Final Guide: Chronic Obstructive Pulmonary Disease, Spirometry, Cataplexy
13 Apr 2015
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Vco2= va x fco2: fractional concentration of co2 %co2/100, rearranged va= vco2/fco2, fraction concentration of co2 is same as partial pressure of co2 therefore pco2 divided by k constant, va= (vco2 x k)/paco2, measure co2 in atrial blood instead of alveolar gas. Interacts with alveolar air with high po2 and become oxygenated: alveolar air po2 (160 mmhg) and pco2 (0. 3mmhg, gas exchange occurs through capillaries in the alveoli with the atm air before it has a chance to reach blood circuit, mixing of air in dead space and blood systemic circuit, alveoli filled with water vapor as well (subtract ph2o from po2, blood flowing through lungs equalized with partial pressure of alveolar air (100 torr o2 and 40 torr co2, when blood enters the systemic capillaries and begins oxygenating the tissues carry away co2 and pa of o2 drops to 40 and pa co2 rises to 46.
