The partial pressure of oxygen in the alveoli of the lungs isA. equal – InterviewSolution

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1.	The partial pressure of oxygen in the alveoli of the lungs isA. equal to that in the bloodB. more than that in bloodC. less than in the bloodD. less than than of carbon dioxide
Answer» Correct Answer - B The partial pressure of oxygen `(pO_(2))` in alveoli of lungs is 104 mm Hg. Which is more than that of blood in the blood capillaries of lung alveoli ( 40 mm Hg). This difference allows passive diffusion of `O_(2)` from air filled in the lungs to the blood vessels of lung alveoli.

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