Physiology The most impoant stimulus controlling the level of resting ventilation is: A PO2 on peripheral chemoreceptors B PCO2 on peripheral chemoreceptors C pH on peripheral chemoreceptors D pH of CSF on central chemoreceptors 💡 Explanation The most impoant stimulus controlling the level of resting ventilation is: ✓ Correct Answer: D. pH of CSF on central chemoreceptors