The rate and depth of normal breathing are controlled by the need to get rid of CO₂.

Question

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The rate and depth of normal breathing are controlled by the need to get rid of excess CO₂ and maintain appropriate levels of oxygen in the body. This is known as the respiratory drive. When CO₂ levels increase, the brain signals the respiratory muscles to increase breathing rate and depth in order to exhale more CO₂ and bring in fresh oxygen.

The Rate and Depth of Normal Breathing Are Controlled by the Need