BIOL 3324 Lecture Notes - Lecture 18: Carbonic Anhydrase, Partial Pressure, Blood Plasma
17 Nov 2016
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Lecture 18: initially between alveoli then blood and tissues, continuous replenishment due to the alveolar oxygen, alveoli blood cell. Alveolar air water layer alveolar epithelia if capillary blood plasma rbc. Diffusion of carbon dioxide: first between tissues and blood then blood and alveoli, due to continuous co2 prod, cells blood alveoli. Depends on the partial pressure of o2 in the alveoli. Hb saturation % = how much hb is bound to o2. Fully saturated if all 4 hemes are bound. Hb increases the o2 carrying capacity of blood. Makes it so that there is (cid:498)less(cid:499) available o2 in the blood. O2 is quickly added to hb in the alveoli. Increases the gradient!!: factors promoting unloading of o2- move the graph to the right. H+ decreases hb"s o2 affinity in the rbc"s. Binds to the globin: bound to hb 21% Co2 transport: dissolved as a gas 6, bicarbonate 70% More soluble in blood than co2 is.
