What effect does a reduced ventilation perfusion ratio have on end-capillary PO₂ and PCO₂?
A) end capillary PO₂ will decrease and end capillary PCO₂ will increase
B) end capillary PO₂ will increase and end capillary PCO₂ will decrease
C) end capillary PO₂ and PCO₂ will both decrease
D) end capillary PO₂ will decrease while end capillary PCO₂ will remain constant

Question

Quizplus · Accepted Answer

A reduced ventilation perfusion ratio means that ventilation (air flow) is reduced in relation to perfusion (blood flow). This leads to a decrease in oxygen levels in the alveoli, which reduces the end-capillary PO₂. At the same time, carbon dioxide accumulates in the alveoli, raising end-capillary PCO₂. The result is a lower oxygenation of the blood and higher carbon dioxide levels.

What Effect Does a Reduced Ventilation Perfusion Ratio Have on End-Capillary