Mr Exham IGCSE - Respiration

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This is a presentation designed to help explain the section of the Edexcel IGCSE Biology course about respiration. For more help with IGCSE Biology please visit mrexham.com

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Mr Exham IGCSE - Respiration

  1. 1. IGCSE Biology Brought to you by mrexham.com Copyright©2015HenryExham MAKING SENSE OF Topic 1.1 Life Processes Respiration
  2. 2. Copyright © 2015 Henry Exham • Can you remember how respiration releases energy? • Can you write out the word equation, and the balanced symbol equation, for aerobic respiration? • Can you write out the word equation for anaerobic respiration? • What are the differences between aerobic and anaerobic respiration? • Can you describe simple experiments to show that carbon dioxide and heat are produced by respiring seeds or other suitable living organisms? (Separate science only) 1.1 Life Processes - Respiration Objectives 2
  3. 3. Copyright © 2015 Henry Exham 1.1 Life Processes - Respiration Respiration 3 • Respiration is a chemical reaction that happens in all our cells to release energy. • This can be used for – Contraction of muscle cells, producing movement – Active transport of molecules and ions – Building large molecules, such as proteins – Cell division • The reaction also releases some heat which is used to maintain steady body temperature.
  4. 4. Copyright © 2015 Henry Exham 1.1 Life Processes - Respiration Respiration 4 • Your cells can carry out two types of respiration. • One with oxygen which is called aerobic respiration and one without oxygen called anaerobic respiration.
  5. 5. Copyright © 2015 Henry Exham 1.1 Life Processes - Respiration Aerobic Respiration 5
  6. 6. Copyright © 2015 Henry Exham 1.1 Life Processes - Respiration Aerobic Respiration 6
  7. 7. Copyright © 2015 Henry Exham 1.1 Life Processes - Respiration Aerobic Respiration 7
  8. 8. Copyright © 2015 Henry Exham 1.1 Life Processes - Respiration Anaerobic Respiration 8 • Respiration without oxygen. • We shall look at examples in two types of cell.
  9. 9. Copyright © 2015 Henry Exham 1.1 Life Processes - Respiration Anaerobic Respiration 9 • Respiration without oxygen. • We shall look at examples in two types of cell.
  10. 10. Copyright © 2015 Henry Exham 1.1 Life Processes - Respiration Anaerobic Respiration 10 • Respiration without oxygen. • We shall look at examples in two types of cell.
  11. 11. Copyright © 2015 Henry Exham 1.1 Life Processes - Respiration Anaerobic Respiration 11 • Also known as FERMENTATION. • Yeast cells are single celled fungi. • Used for commercial purposes such as brewing. YEAST
  12. 12. Copyright © 2015 Henry Exham 1.1 Life Processes - Respiration Anaerobic Respiration 12 YEAST • Also known as FERMENTATION. • Yeast cells are single celled fungi. • Used for commercial purposes such as brewing. Glucose Ethanol + Carbon Dioxide (+ some energy)
  13. 13. Copyright © 2015 Henry Exham 1.1 Life Processes - Respiration Anaerobic Respiration 13 MUSCLE • Occurs when the blood cannot reach the muscles fast enough to supply them with the required oxygen.
  14. 14. Copyright © 2015 Henry Exham 1.1 Life Processes - Respiration Anaerobic Respiration 14 MUSCLE • Occurs when the blood cannot reach the muscles fast enough to supply them with the required oxygen. Glucose Lactic Acid (+ some energy)
  15. 15. Copyright © 2015 Henry Exham 1.1 Life Processes - Respiration Anaerobic Respiration 15 MUSCLE • Anaerobic respiration provides enough energy to keep the muscles working for a short time. • However lactic acid builds up in the blood which causes cramps. • The lactic acid has to be broken down using oxygen. • The volume of oxygen needed to completely oxidise the lactic acid that builds up in the body during anaerobic respiration is called oxygen debt
  16. 16. Copyright © 2015 Henry Exham 1.1 Life Processes - Respiration Aerobic or Anaerobic Respiration 16
  17. 17. Copyright © 2015 Henry Exham 1.1 Life Processes - Respiration Respiration experiments 17
  18. 18. Copyright © 2015 Henry Exham 1.1 Life Processes - Respiration Respiration experiments 18
  19. 19. This PowerPoint is protected under copyright. It is designed for educational use. Either personal study or to be presented to a class. It may be edited or duplicated for these purposes only. It must not be shared or distributed online in any format. Some images used are under a separate creative commons license, these are clearly marked. Copyright © 2015 Henry Exham Brought to you by MrExham.com TERMS AND CONDITIONS 19
  20. 20. You can find all my resources on mrexham.com or go straight to my Sellfy store
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