The primary drive to breath is elicited by which of the following:

Question

Quizplus · Accepted Answer

The primary drive to breathe is elicited by an increase in the partial pressure of carbon dioxide (PCO2) in the blood (P_CO2). This increase in PCO2 triggers the respiratory centers in the brain to stimulate breathing and eliminate the excess CO2. A decrease in PCO2 can also affect breathing, but to a lesser extent than an increase. A change in the partial pressure of oxygen (PO2) can also affect breathing but mainly as a secondary response to the increase in PCO2.

The Primary Drive to Breath Is Elicited by Which of the Following