Which of the Following is the Major Regulator of Respiratory

Question

Which of the following is the major regulator of respiratory activity?
A) PO2
B) PCO2
C) Bicarbonate
D) Albumin

Accepted Answer

PCO₂ is the major regulator of respiratory activity as it directly affects the pH of the blood and cerebrospinal fluid, which is closely monitored by central chemoreceptors.