The most important factor in the control of breathing is the amount of oxygen in the blood.

Question

Quizplus · Accepted Answer

The most important factor in the control of breathing is the amount of carbon dioxide in the blood, not oxygen. High levels of carbon dioxide signal the brain to increase breathing rate and depth to remove excess carbon dioxide and maintain proper pH levels in the blood. Oxygen levels also play a role, particularly in cases of hypoxia, but their impact on breathing is secondary to carbon dioxide levels.

The Most Important Factor in the Control of Breathing Is