Normally,the central chemoreceptors responsible for triggering ventilation changes respond to which of the following?

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Ventilation increases when the hydrogen ion concentration increases and decreases when the hydrogen ion concentration decreases.An increase in the partial pressure of carbon dioxide (PaCO₂)causes the movement of carbon dioxide across the blood-brain barrier into the cerebrospinal fluid,stimulating the movement of hydrogen ions into the brain's extracellular fluid.Peripheral chemoreceptors respond to changes in PaO₂ levels.

Normally,the Central Chemoreceptors Responsible for Triggering Ventilation Changes Respond to Which