Compared to $O_2$,the diffusion rate of $CO_2$ through the diffusion membrane per unit difference in partial pressure is much higher. Explain.
(N/A) The solubility of $CO_2$ is $20-25$ times higher than that of $O_2$. Due to this high solubility,the amount of $CO_2$ that diffuses across the diffusion membrane per unit difference in partial pressure is significantly greater than that of $O_2$.
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Match the Column-$I$ with Column-$II$ regarding the partial pressures of gases ($PO_2$ and $PCO_2$) in different respiratory sites:
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| Column-$I$ | Column-$II$ |
|---|---|
| $A$. Alveoli | $i$. $0.3 \ mmHg \ PCO_2$ |
| $B$. Deoxygenated blood | $ii$. $45 \ mmHg \ PCO_2$ |
| $C$. Atmospheric air | $iii$. $104 \ mmHg \ PO_2$ |
| $D$. Tissue | $iv$. $40 \ mmHg \ PO_2$ |
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