Question

Which of these statement describes why increased respiration within a tissue leads to vasodilation of arterioles?
a. oxygen levels increase
b. parasympathetic activity increases
c. sympathetic activity increases
d. carbon dioxide levels increase

Answer 1

Answer:

The correct option is: d. carbon dioxide levels increase

Explanation:

Vasodilation refers to the widening of the blood vessels due to the lack of oxygen and higher carbon dioxide levels in the tissues. The vasodilation of the blood vessels when the smooth muscle cells in the vessel walls relax and dilate, which decreases the vascular resistance and increases the blood flow and thus increases the cardiac output.