What effect does hyperventilation have on blood vessels?

Hyperventilation leads to a decrease in carbon dioxide levels in the blood, a condition known as respiratory alkalosis. This change in the blood chemistry causes the blood vessels, particularly the peripheral vessels, to constrict. The body responds to lower levels of carbon dioxide by trying to balance pH levels, resulting in vasoconstriction to help maintain adequate blood flow and pressure. This physiological response can lead to sensations such as lightheadedness or tingling due to reduced blood flow to certain areas, particularly the brain. Therefore, the effect of hyperventilation on blood vessels is characterized by their constriction.