Anaerobic breakdown of glucose yields energy to muscle when energy demand surpasses the body’s ability to produce energy aerobically, but it does require large amounts of muscle glycogen reserve. What happens if glycogen is depleted, but the energy need is still high?

Question

1.Muscles use fat for energy
2.Fatigue sets in
3.Capacity for work decreases
4.More oxygen is required
5.Both “fatigue sets in” and “capacity for work decreases” are true.

Answer 1

5