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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