Aerobic and Anaerobic respiration

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1. What do the changes to breathing and heart rate during exercise cause?

  • Quicker rate of Gaseous exchange in lungs (so respiration can happen more quickly) and arteries dilate
  • Nerve impulses are sent to brain more quickly
  • Stomach digests food more quickly
  • Arteries constrict (stopping blood flowing away from muscles)
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2. What is Oxygen debt?

  • The amount of Oxygen needed to normalise the Oxygen levels in the blood after exercise
  • The amount of oxygen that must flow through muscles to oxidise and remove the lactic acid the has built up
  • The amount of oxygen needed to oxidise the CO2 produced in Aerobic respiration

3. What percent of energy is released by Anaerobic compared to aerobic respiration?

  • 500%
  • 5%
  • 50%
  • 0.5%

4. Why does anaerobic respiration happen?

  • Muscles can't be supplied with Oxygen quickly enough
  • Water is being lost too quickly from sweat and breathing
  • So muscles can produce more than using Aerobic respiration

5. What is the only reactant during anaerobic respiration?

  • Protein
  • water
  • glucose
  • Carbon dioxide


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