A Twofold Increase in the Blood Flow Through a Pulmonary

Question

A twofold increase in the blood flow through a pulmonary arteriole is associated with:
A)No significant change in pulmonary vascular resistance.
B)A twofold increase in pulmonary vascular resistance.
C)A fourfold increase in pulmonary vascular resistance.
D)A 15-fold increase in pulmonary vascular resistance.

Accepted Answer

Pulmonary circulation is unique in its ability to accommodate increased blood flow with minimal changes in resistance, due to the recruitment of additional vessels and distension of existing vessels. This allows for a significant increase in blood flow without a corresponding increase in pulmonary vascular resistance.