Question : The difference in the partial pressures of carbon dioxide is very less at the alveoli of lungs (about 5 mm Hg). Still higher amount of carbon dioxide can diffuse through the diffusion membrane compared to that of Oxygen. The reason is

Question : The difference in the partial pressures of carbon dioxide i

1.	Question : The difference in the partial pressures of carbon dioxide is very less at the alveoli of lungs (about 5 mm Hg). Still higher amount of carbon dioxide can diffuse through the diffusion membrane compared to that of Oxygen. The reason is
Answer» Difference in the PARTIAL pressures of oxygen is low at the alveoli of lungs when compared to `CO_2` Solubility of carbon dioxide is 20-25 times higher than that of oxygen. The alveolar membrane is with a SINGLE LAYER of thin SQUAMOUS epithelium Thin diffusion membrane is favourable for diffusion of gases Answer :B