Pressoreceptors are sensors located in blood vessels that detect changes in blood pressure. They send signals to the brain to help regulate and maintain blood pressure within a normal range. This feedback system is crucial for homeostasis and ensuring adequate blood flow to organs and tissues.
carotid body
the parasympathetic nervous system has little effect because it calms the body but the sympathetic system causes vasoconstriction (when the blood vessels get narrow) and that narrowing increases the blood pressure. the pressoreceptors are activated and it sends off signals which makes the arteries of the neck and chest which brings BP back up to normal.