This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Physiology
The blood pressure regulatory system that is labeled as a buffer system is 
Select and explain. 
A. Baroreceptor, B. Chemoreceptor, C. Kidney, D. CNS ischemic response
A: Baroreceptor
Answer: A: Baroreceptor 
Explanation: 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