NEED ANSWER ASAP PLEASE!! During exercise or increased activity in the body, increases in carbon dioxide and then increased acid from formation of bicarbonate ions also happening in our blood! Our body actually responds faster to the increase of acid compared to the decrease of oxygen. This is hard for many to grasp because likely your whole life, you have been taught that you breathe to get more oxygen in. Instead, the way the human body actually works is you breathe to get primarily push carbon dioxide out and you happen to also get more oxygen in.

Let’s put this idea together into a feedback loop. Put the phrases in order starting with cellular respiration increases due to physical activity:

phrases: blood carbon dioxide levels increase, blood acid levels increase, blood acid levels decrease, blood carbon dioxide levels decrease, breathing rate and volume increase, breathing rate and volume decreases, the brain detects increased levels of acid, the brain detects decreased levels of acid, cellular respiration rates increases, cellular respiration rates decrease