The blood pressure regulatory system that is labeled as a buffer system is
Baroreceptor system opposes either increases or decreases in aerial pressure, it is called a pressure buffer system, and the nerves from the baroreceptors are called buffer nerves.Ref: Guyton and Hall textbook of medical physiology 13th edition. Page: 221
Baroreceptor
Chemoreceptor
Kidney
CNS ischemic response
Cardiovascular system