Question

Peripheral chemoreceptors are sensitive to

• A. Oxygen concentration
• B. Artrial carbon dioxide
• C. pH
• D. All of the above

Answer 1

The correct option is D All of the above

• Peripheral chemoreceptors (of the carotid and aortic bodies) are so named because they are sensory extensions of the peripheral nervous system into blood vessels where they detect changes in chemical concentrations.
  
• peripheral chemoreceptors help maintain homeostasis in the cardiorespiratory system by monitoring concentrations of blood-borne chemicals.
• These sensors respond to variations in a number of blood properties, including low oxygen (hypoxia), high carbon dioxide (hypercapnia), and low glucose (hypoglycemia). Hence, Peripheral chemoreceptors are sensitive to Oxygen concentration, Arterial carbon dioxide and pH.

So, the correct answer is 'All of the above'.