If blood pressure rises, how do resistance vessels respond?

Resistance vessels, which are primarily the arterioles in the circulatory system, play a crucial role in regulating blood flow and blood pressure. When blood pressure rises, these vessels respond by constricting. This constriction decreases the diameter of the resistance vessels, leading to an increase in vascular resistance. By increasing resistance, the blood pressure can be regulated and stabilized within a normal range, helping to prevent the potential adverse effects of excessively high blood pressure on the cardiovascular system.

The constriction of resistance vessels is a physiological mechanism that helps maintain homeostasis. When vascular resistance is increased through constriction, it can effectively manage the increased blood flow that may result from elevated blood pressure, ensuring that organs and tissues receive an adequate supply of blood without overwhelming the system.