Baroreceptors and Blood Pressure Regulation: How Vessel Stretch Works

Baroreceptors are the receptors that trigger responses to control blood pressure as vessels stretch. They are located in the walls of the arteries and heart, and they sense changes in blood pressure and blood volume. When blood pressure increases, the baroreceptors send signals to the brain, which causes a reflex decrease in heart rate and blood vessel constriction. This decrease in heart rate and blood vessel constriction causes blood pressure to decrease. When blood pressure decreases, the baroreceptors send signals to the brain, which causes a reflex increase in heart rate and blood vessel dilation. This increase in heart rate and blood vessel dilation causes blood pressure to increase.

The baroreflex is a very important mechanism for maintaining blood pressure homeostasis. It helps to ensure that blood pressure does not get too high or too low.