In the upright position,which region of the right lung would have the lowest ventilation-perfusion ratio?
A) lower lobe
B) upper lobe
C) middle lobe
D) hilum

Question

Quizplus · Accepted Answer

The lower lobe of the lung is typically more perfused than ventilated in the upright position, resulting in a lower ventilation-perfusion ratio. This is because gravity causes more blood to flow to the lower regions of the lung, while ventilation is more evenly distributed throughout the lung. As a result, gas exchange may not be as efficient in the lower lobe compared to the upper or middle lobes.

In the Upright Position,which Region of the Right Lung Would