Practice question

MCQ

Question

Which of the following statements regarding alveolar gas exchange is correct?

Options

Choose one · Correct answer highlighted

O₂ diffuses from the alveoli into the blood due to a lower pO₂ in the alveolar air. CO₂ diffuses from blood into alveoli due to its lower solubility in plasma. Alveoli are lined with a thin epithelial layer to facilitate gas diffusion. Correct Gas exchange in alveoli occurs by active transport.

Explanation

Alveoli are lined with a thin squamous epithelial layer to facilitate efficient gas diffusion.

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