The most impoant stimulus controlling the level of resting ventilation is:
The most impoant stimulus comes from the pH of the CSF on the central chemoreceptors. The other choices are incorrect: The effect of PO2 on the peripheral chemoreceptors under normoxic conditions is very small. Changes in PCO2 do affect the peripheral chemoreceptors, but the magnitude is less than that for the central chemoreceptors. The effect of changes in pH on peripheral chemoreceptors under normal conditions is small, and changes in PO2 do not affect the central chemoreceptors.
PO2 on peripheral chemoreceptors
PCO2 on peripheral chemoreceptors
pH on peripheral chemoreceptors
pH of CSF on central chemoreceptors
Respiratory System Pa 2