NEET Biology question

Among the following, the partial pressure of oxygen is maximum in

(A)alveolar air
(B)arterial blood
(C)venous blood
(D)expired airCorrect

Answer: (D)

Solution

Because expired air is a mixture of alveolar air and the higher-oxygen dead-space air that never reached the alveoli, its pO (~116 mm Hg) is actually slightly higher than that of

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Question ID VK-119294