Question

Central chemoreceptors are sensitive to the

• A. pH of their environment
• B. Level of oxygen
• C. High blood pressure
• D. Level of sugar in blood

Answer 1

The correct option is A pH of their environment

Central chemoreceptors are located on the ventrolateral medullary surface in the central nervous system. There receptors act to detect the changes in pH of their environment by detecting alteration in the concentration of O${}_2$ and CO${}_2$ of nearby cerebrospinal fluid. The decrease in CO${}_2$ causes the blood to become more acidic while it's increase makes the blood alkaline.

So, the correct answer is 'pH of their environment'.