how does cellular respiration explain why animals breathe rapidly when they are running?; which must an animal do in order for cellular respiration to begin?; what should be changed to show the correct chemical reaction?; which explains why it is important to eat a full healthy meal before an afternoon of playing sports?; what are water and carbon dioxide in the cellular respiration reaction?; in which way will energy be used after it leaves the mitochondrion during cellular respiration?; which is a product of the cellular respiration reaction?; where does the first stage of cellular respiration occur? w x y z