The respiratory membranes facilitates the exchange of respiratory gases through diffusion. Oxygen enters the deoxygenated blood through diffusion because
- APartial pressure of oxygen in alveolar air and capillaries is 40 mm Hg and 100 mm Hg respectively
- BPartial pressure of oxygen in alveolar air and capillaries is 100 mm Hg and 40 mm Hg respectively
- CPartial pressure of oxygen in alveolar air and capillaries is 46 mm Hg and 40 mm Hg respectively
- DPartial pressure of oxygen in alveolar air and capillaries is 40 mm Hg and 46 mm Hg respectively
✓ Correct answer: B
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