What chemical normally provides the most important stimulus for breathing?

Question

Quizplus · Accepted Answer

The chemical that normally provides the most important stimulus for breathing is increased carbon dioxide in the blood. When carbon dioxide levels increase, it causes a decrease in blood pH (acidosis), which triggers a response from the respiratory system to increase breathing rate and depth to remove the excess carbon dioxide and increase oxygen intake.

What Chemical Normally Provides the Most Important Stimulus for Breathing