Question

Why is oxygen such an important input for cellular respiration?

Answer 1

Well oxygen is important for cellular respiration when it comes to humans and some other animals but for some other organisms and cells they don't require oxygen.

Explanation: Why we would say oxygen is important for the cellular respiration of humans is because if you take it away this can destroy the whole process of cellular respiration which can harm the humans. Metabolic poisons or Rat poisons work in a similar way by disrupting process done by enzymes in cellular respiration so just like that taking oxygen will disrupt cellular respiration in the human harming them or even causing death as parts of the cell such as the mitochondria use it in fact one of the parts of the cycle for making ATP for some animals requires oxygen such as the Krebs cycle.

Answer 2

Oxygen is important because it makes aerobic respiration possible by accepting electrons from the transport chain in the mitochondria. Sometimes oxygen is unavailable in some of your muscle cells (typically during heavy exercise); at times like these, the muscle cells will temporarily revert to lactic acid fermentation, which yields far less energy.

Step-by-step explanation: