Which of the following would not result in the dilation of the feeder arterioles and opening of the precapillary sphincters in systemic capillary beds?
A) a local increase in pH
B) an increase in local tissue carbon dioxide
C) a decrease in local tissue oxygen content
D) a local increase in histamine

Question

Quizplus · Accepted Answer

A local increase in pH would not result in the dilation of the feeder arterioles and opening of the precapillary sphincters in systemic capillary beds. This is because an increase in pH indicates a more alkaline environment, which typically does not trigger vasodilation. In contrast, a decrease in pH (indicating an increase in acidity, often due to increased CO2 or decreased O2) would lead to vasodilation to increase blood flow and oxygen delivery.

Which of the Following Would Not Result in the Dilation