Final answer:
The energy systems can be ranked based on total ATP produced as follows: 1) Aerobic respiration (most efficient), 2) Electron Transport Chain, 3) Krebs cycle and Glycolysis, and 4) Anaerobic glycolysis (least total ATP).
Step-by-step explanation:
Ranking Energy Systems Based on ATP Production
When considering the amount of ATP produced by different energy systems in the body, they can be ranked based on their total ATP yield from most to least. The body uses these systems depending on the availability of oxygen and the duration and intensity of the exercise.
- Aerobic respiration - This is the most efficient system, capable of producing up to 36-38 ATP molecules per glucose molecule. It is used during long-duration, low to moderate intensity exercises and relies on oxygen.
- Electron Transport Chain (ETC) - This part of aerobic respiration produces the most ATP, about 34 ATP molecules from the complete oxidation of one molecule of glucose.
- Krebs cycle and Glycolysis - Glycolysis can produce a net gain of 2 ATP molecules per glucose molecule under anaerobic conditions. The entire process of glycolysis followed by the Krebs cycle can yield a significant amount but is not as productive as the ETC in terms of ATP production.
- Anaerobic glycolysis - This system produces ATP quickly but in smaller amounts, with a net gain of 2 ATP molecules per glucose molecule as it doesn't use oxygen. It is used during short, high-intensity exercises such as sprinting.
These energy systems work together to supply ATP to muscles during different types of exercise, from quick sprints to long-distance running.