Q:

The goal of respiration is to control the concentration of which substances dissolved in the blood?

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The goal of respiration is to control the concentration of which substances dissolved in the blood?


  1. oxygen
  2. oxygen and carbon dioxide
  3. oxygen, carbon dioxide and hydrogen ions
  4. oxygen, carbon dioxide, hydrogen ions and ATP

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C: Respiratory activity responds to changes in the dissolved concentration of these 3 substances in blood. 

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