NEET Biology question

Biology Breathing and Exchange of Gases NEET

Partial pressures of oxygen and carbon dioxide in healthy human lung alveoli are, respectively, nearest to

(A)104 and 40 mmHgCorrect
(B)90 and 20 mmHg
(C)40 and 45 mmHg
(D)159 and 0.3 mmHg

Answer: (A)

Solution

Standard alveolar air has a pO of about 104 mmHg and a pCO of about 40 mmHg, so option (a) is correct.

Question ID VK-119381