First slide

Exchange of Gases

Question

The partial pressure of oxygen in the alveoli of the lungs is

Easy

A

equal to that in the blood
B

more than that in the blood
C

less than that in the blood
D

less than that of carbon dioxide

Solution

Partial pressure of oxygen in alveoli = 104 mm Hg Partial pressure of oxygen in deoxygenated blood = 40 mm Hg Partial pressure of oxygen in oxygenated blood = 95 mm Hg.

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