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6. What is breathing?

  • The process that gets oxygen into the body for respiration
  • Respiration

7. What does the 'paid back' oxygen do?

  • Break down lactic acid into carbon dioxide and water
  • Take its place

8. What is the process that occurs inside cells to release the energy from food substances?

  • Respiration
  • Photsynthesis

9. Which is more efficient?

  • Aerobic respiration, more energy is released per molecule of glucose
  • Anaerobic respiration, more energy is released per molecule of glucose

10. Is all of the energy from respiration useful?

  • No, some is lost as heat
  • Yes, none is lost as heat

11. Ethanol is...

  • An alcohol
  • A chemical

12. When oxygen is used in respiration it is called __________

  • Aerobic respiration
  • Anaerobic respiration

13. _____ of the chemical reactions in respiration are controlled by enzymes

  • None
  • All
  • Some

14. The energy released by respiration is needed for...

  • All life processes
  • A variety of life processes
  • Some life processes

15. What is the shortage of oxygen called in such situations?

  • Oxygen debt
  • Lack of oxygen
  • Over carbon dioxide

16. Glucose ----> lactic acid + ENERGY

  • Anaerobic respiration
  • Aerobic respiration

17. Measuring the amount of carbon dioxide or heat given off in a certain time or measuring thee oxygen used in a given time can find the __________

  • Rate of photosynthesis
  • Rate of respiration
  • Respiration
  • Rate of carbon dioxide

18. Fermentation is....

  • Anaerobic respiration in yeast
  • Anaerobic respiration in animals
  • Aerobic respiration

19. Which releases more energy?

  • Aerobic respiration
  • Anaerobic respiration

20. How does the body pay back the 'oxygen debt'?

  • By breathing faster and deeper for a while after exercise has finished
  • By breathing slower and lighter for a while after exercise has finished