What is one effect of stimulated baroreceptors?

When baroreceptors are stimulated, they primarily respond to changes in blood pressure. Their activation leads to reflex adjustments in cardiovascular regulation. One of the main effects of stimulated baroreceptors is increased parasympathetic tone and decreased sympathetic activity, which can lead to various physiological responses that help regulate blood pressure.

Increased compliance in the venous system is an expected outcome of the actions initiated by baroreceptors. When blood pressure rises, baroreceptors sense this increase and relay that information to the central nervous system, which can then lead to responses that enhance the ability of the veins to accommodate blood volume, effectively increasing their compliance. This serves to lower the overall workload on the heart and helps to reduce blood pressure back to normal levels.

The other answers present misunderstandings of the baroreceptor response. Increased sympathetic discharge to the SA node would typically elevate heart rate and blood pressure rather than respond to the stimulation of baroreceptors. Decreased parasympathetic discharge is also inconsistent with baroreceptor activation, as increased vagal tone is favored instead. Reduced blood flow to the extremities would not be a direct effect of baroreceptor stimulation either; baroreceptors mainly adjust the overall systemic vascular resistance and heart rate rather than leading to localized blood