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

Question

Quizplus · Accepted Answer

In the upright position, gravity causes blood to pool in the lower regions of the lungs, leading to higher perfusion in the lower lobes. However, ventilation does not increase to the same extent, resulting in a lower ventilation-perfusion (V/Q) ratio in the lower lobes compared to the upper lobes.

In the Upright Position, Which Region of the Right Lung