What does adequate gas exchange depend on?
A) The perfusion/diffusion ratio
B) An adequate ventilation-perfusion ratio
C) The diffusion of gas in the shunted blood
D) The shunting of blood in the lungs
Ans: B
Feedback: Adequate gas exchange depends on an adequate ventilation–perfusion (adV/adQ) ratio. There is no perfusion/diffusion ratio so answer A is incorrect. Adequate gas exchange does not depend on the diffusion of gas in shunted blood or the shunting of blood in the lungs.
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