HTHSCI 1CC6 Chapter Notes - Chapter 1: Fetal Circulation, Pulmonary Circulation, Perfusion

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26 Oct 2021
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The total pressure exerted by a mixture of gases is the sum of the pressures exerted independently by each gas in the mixture (add all the partial pressures) When a gas is in a container with a liquid, the gas will dissolve in the liquid proportion to it"s partial pressure. The greater the of a particular gas in the gas phase, the more and the faster the gas will go into solution in liquid. The partial pressure of the gas in contact with the liquid. Alveoli contain more co2 and water vapor and less o2 due to: Dark red blood (colour change due to uptake of o2 and binding of hemoglobin) Drive the diffusion of gases- o2 diffuses rapidly. Steep gradient of o2 (po2 in deoxygenated blood is 40 mm hg while in the alveoli is 104 mm hg) Takes about . 25 second to become oxygenated blood.

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