What is the primary regulator of the magnitude of alveolar ventilation under normal circumstances?

Question

Quizplus · Accepted Answer

The primary regulator of the magnitude of alveolar ventilation under normal circumstances is the H⁺ concentration in the brain extracellular fluid, which is monitored by central chemoreceptors. These chemoreceptors are sensitive to changes in the pH of the surrounding fluid, which indirectly reflects the CO₂ levels in the blood, as CO₂ readily crosses the blood-brain barrier and changes into carbonic acid, altering the pH. This mechanism is more sensitive and immediate in adjusting ventilation to maintain homeostasis compared to the other options listed.

What Is the Primary Regulator of the Magnitude of Alveolar