Which Respiratory Control Centres are Most Sensitive to Changes in CO₂

Question

Which respiratory control centres are most sensitive to changes in CO2?
A) the receptors of the cortex
B) the aortic bodies
C) the carotid bodies
D) the receptors of the medulla

Accepted Answer

The receptors of the medulla, specifically the central chemoreceptors, are most sensitive to changes in CO2 levels in the blood. They respond to changes in the pH of the cerebrospinal fluid, which is influenced by CO2 levels.