The baroreceptors in the carotid sinus and aortic arch are sensitive to which of the following?

Question

Quizplus · Accepted Answer

The baroreceptors in the carotid sinus and aortic arch are sensitive to changes in arterial pressure. When arterial pressure increases, these receptors send signals to the cardiovascular centers in the brainstem to decrease sympathetic activity and increase parasympathetic activity, leading to a decrease in heart rate and vasodilation, and ultimately a lowering of blood pressure. Conversely, when arterial pressure decreases, the receptors send signals to increase sympathetic activity and decrease parasympathetic activity, leading to an increase in heart rate and vasoconstriction, and ultimately a raising of blood pressure. The baroreceptors are not sensitive to changes in carbon dioxide or oxygen levels.

The Baroreceptors in the Carotid Sinus and Aortic Arch Are