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6. Why do muscles become fatigued during exercise?
- Lactic acid build in the muscles
- Because the athlete did not drink enough water.
- Because the athlete is not healthy
7. What do muscles need more of during exercise?
- Energy
- Water
- Mitochondria
8. Explain what is meant by oxygen debt.
- The amount of oxygen needed to remove lactic acid.
- When your cells don't have any oxygen.
9. What is meant by anaerobic respiration?
- Respiration without using oxygen
- Build up of lactic acid.
- Not being able to breathe during exercise