I need help on this fill in the blank science question for my study guide on Cellular Respiration "More active cells need more ______ to release more _______"

To find the correct word to fill in the blanks, you need to understand the concept of cellular respiration. Cellular respiration is the process by which cells convert glucose and oxygen into energy, carbon dioxide, and water.

The key idea in this question is that more active cells require more of something to release more of something else. In cellular respiration, cells need more oxygen to release more energy.

Therefore, the answer to the question is:

"More active cells need more oxygen to release more energy."