Carotid baroreceptors:

Ans. A. Are important in the rapid, short term regulation of arterial blood pressureThe function of these baroreceptors is the rapid short-term regulation of arterial blood pressure. The receptors start firing at a pressure of approximately 40 mm Hg. They completely adapt over 1 to 2 days, not weeks. In general, changes in baroreceptor activity have little effect on cerebral blood flow. The sympathetic activity following a fall in blood pressure results in increased heart rate and contractility, which raises myocardial metabolism and coronary blood flow,