Which of the following statements about the ventilation/perfusion (V/Q) ratio in a healthy person is true?

Question

Quizplus · Accepted Answer

In a healthy person, the V/Q ratio is highest in the upper part of the lungs where there is more ventilation than blood flow. As we move down the lungs, the ratio decreases as blood flow increases and ventilation decreases. Therefore, option B is the correct statement about the V/Q ratio in a healthy person. Option A is incorrect because it implies that V/Q ratio is equal throughout the lungs. Option C is incorrect because the amount of oxygen in the lungs is greater than the amount of blood. Finally, option D is incorrect because the lower portion of the lungs has more perfusion than oxygen due to blood flow increasing as we move towards the base of the lungs.

Which of the Following Statements About the Ventilation/perfusion (V/Q) Ratio