ANATOMY

Detailed explanation-1: -Baroreceptors are mechanoreceptors located in blood vessels near the heart that provide the brain with information pertaining to blood volume and pressure, by detecting the level of stretch on vascular walls. As blood volume increases, vessels are stretched and the firing rate of baroreceptors increases.

Detailed explanation-2: -In certain parts of your body, baroreceptors, which are special nerve endings, can “sense” artery wall stretch.

Detailed explanation-3: -Arterial baroreceptors function to inform the autonomic nervous system of beat-to-beat changes in blood pressure within the arterial system.

Detailed explanation-4: -A sudden increase in blood pressure stretches the baroreceptors and the increased firing results in the vasomotor center inhibiting sympathetic drive and increasing vagal tone on the SA node of the heart. The SA node is slowed by the acetylcholine and heart rate slows to correct the increase in pressure.