Why does it take approximately 24 hr for a full ventilatory response to develop to acute hypoxemia?

Question

Quizplus · Accepted Answer

High altitude causes a healthy person's ventilation to increase because low barometric pressure decreases the inspired PO₂, and thus the arterial PO_2,which in turn raises the sensitivity of peripheral chemoreceptors to hydrogen ions. The resulting increase in ventilation is less than expected though, because hyperventilation lowers the PaCO₂ and raises arterial pH. The increased pH depresses the medullary respiratory center, counteracting the excitatory effect of a low PaO₂ on peripheral chemoreceptors.

Why Does It Take Approximately 24 Hr for a Full