An increased breathing rate is most closely associated with which of the following?

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An increased breathing rate is most closely associated with an increase in blood carbon dioxide levels. Carbon dioxide is a waste product of cellular respiration and is transported to the lungs to be exhaled. When blood carbon dioxide levels increase, the body responds by increasing breathing rate to eliminate the excess carbon dioxide and bring blood carbon dioxide levels back down to normal.

An Increased Breathing Rate Is Most Closely Associated with Which