Identify the true statement about peripheral chemoreceptors. A) They respond to changes in hydrogen ion concentration in the cerebrospinal fluid. B) They are sensitive to changes in partial pressure of O₂ in the blood. C) They respond to changes in partial pressure of CO₂ in the cerebrospinal fluid. D) They are insensitive to partial pressure of CO₂ in the blood. E) They are insensitive to changes in hydrogen ion concentration in the blood.

Question

Quizplus · Accepted Answer

Peripheral chemoreceptors are located in the carotid and aortic bodies and are sensitive to changes in arterial blood gases. They respond to changes in the partial pressure of oxygen (PO2), carbon dioxide (PCO2), and hydrogen ions (pH) in the blood. Option A is incorrect as they respond to changes in hydrogen ion concentration in the arterial blood not the cerebrospinal fluid. Option C is incorrect as peripheral chemoreceptors are not located in the cerebrospinal fluid. Option D is incorrect as they are sensitive to partial pressure of CO2 in the blood. Option E is incorrect as they are sensitive to changes in hydrogen ion concentration in the blood.

Identify the True Statement About Peripheral Chemoreceptors