A relatively small rise in arterial carbon dioxide partial pressure stimulates an increase in breathing rate.

Question

Quizplus · Accepted Answer

This statement is true. Arterial carbon dioxide partial pressure (PaCO2) is one of the key regulators of breathing rate. When PaCO2 rises even slightly, it signals the brain to increase breathing to eliminate the excess carbon dioxide from the body. This response is mediated by specialized cells in the brainstem known as central chemoreceptors, which are sensitive to changes in PaCO2 and pH.

A Relatively Small Rise in Arterial Carbon Dioxide Partial Pressure