First slide

Exchange of Gases

Question

Which of the following are equal?

Moderate

A

pCO₂ in the alveoli and pO₂ resting tissues
B

pO₂ in the deoxygenated blood and pCO₂ resting tissues
C

pO₂ in the alveoli and pO₂ in the oxygenated blood
D

pCO₂ in the carotid artery and pCO₂ in the pulmonary artery

Solution

pCO₂ in the alveoli (40 mm Hg) = pO₂ in the resting systemic tissues (40 mm Hg)

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