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| Description: A) At a systemic capillary bed: 1. CO2 diffuses from a body cell into plasma, then into a red blood cell. 2. Carbonic anhydrase catalyses formation of bicarbonate (HCO3–). 3. Bicarbonate diffuses into plasma. B) At a pulmonary capillary bed: 1. Bicarbonate diffuses from plasma into a red blood cell. 2. Carbonic anhydrase catalyses formation of water and CO2. 3. CO2 diffuses across respiratory membrane into air in an alveolus. Picture Stats: Views: 154 Filesize: 383.5kB Height: 1041 Width: 1256 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=47494 |