Physiology Concerning the peripheral chemoreceptors, True is: A They respond to changes in the aerial PO2 but not pH B Under normoxic conditions, the response to changes in PO2 is very small C The response to changes in PCO2 is slower than for central chemoreceptors D They are the most impoant receptors causing an increased ventilation in response to a rise in PCO2. 💡 Explanation Concerning the peripheral chemoreceptors, True is: ✓ Correct Answer: B. Under normoxic conditions, the response to changes in PO2 is very small