Respiration Chapter 10
Lesson Objectives <ul><li>What is respiration? </li></ul><ul><li>Aerobic & Anaerobic respiration </li></ul><ul><li>To show...
Why do living organisms respire? Light     chemical energy ultimate source of energy (light) (stored in organic molecules...
Respiration glucose +  oxygen     carbon dioxide +  water  +  energy Definition: Respiration is the  oxidation  of food s...
Why respire? <ul><li>Uses of energy </li></ul><ul><li>Protein synthesis from a.a </li></ul><ul><li>Cell division </li></ul...
Aerobic vs Anaerobic respiration
Aerobic  respiration  ( in the presence of O 2 ) glucose +  oxygen     carbon dioxide +  water  +  energy in living cells...
Alcoholic fermentation raising of bread smell Qn: Yeast is able to respire aerobically and anaerobically. How do we make t...
Olympics (400m relays) 1) aerobically 2) anaerobically
Anaerobic respiration in muscles Start End respire aerobically panting (remove CO 2 ; take in O 2 ) respire anaerobically ...
Changes in muscles during vigorous contractions
Anaerobic respiration in muscles glucose     lactic acid  +  energy Insufficient O 2 (vigorous muscle contraction) accumu...
During the race… <ul><li>muscular contractions are so vigorous that maximum aerobic respiration is unable to produce energ...
During rest… Muscles (lactic acid) Liver lactic acid  ->  energy oxidised lactic acid transported to Glucose lactic acid  ...
During rest… <ul><li>the breathing rate continues to remain fast for some time to provide sufficient O 2  to repay the O 2...
How do we know if organisms respire?
10.1 To show respiration in an animal Live cockroach Dead cockroach (soaked in formalin to prevent decay) Leave for a few ...
To show respiration in an animal Live cockroach Dead cockroach (soaked in formalin to prevent decay) After a few hours Not...
10.2 To find out whether CO 2  is given off during respiration Hydrogen carbonate indicator Predict the likely observation...
10.2 To find out whether CO 2  is given off during respiration ( absorbs CO 2 ) ( chalky; presence of CO 2 ) ( ensures CO ...
10.3 To find out whether carbon dioxide is given off during fermentation ( creates anaerobic environment ) ( turns chalky;...
10.4 To find out whether heat is produced during respiration ( preservative + kills bacteria ) ( preservative + kills bact...
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Chapter 10 Respiration Lesson 1 - Aerobic and Anaerobic Respiration and the Experiments

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  • this is so simple and definitely my way of leaning....2 much words can be really discouraging but this is prefect ^^...Thanks alot :)
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  • dear smart author, can you share your inspirational and impressive slides? as a student your slide really helps me a lot to ace my biology test. Can you forward it for me...please...
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  • hi your slides are very impressive and i would like to use your slides for teaching. Would you mind in sharing your slides? Thanks in advance.
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  • Hi I felt that your slides are very apt for teaching respiration currently since the olympics just ended. Would it be possible to forward me your slides?
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Chapter 10 Respiration Lesson 1 - Aerobic and Anaerobic Respiration and the Experiments

  1. 1. Respiration Chapter 10
  2. 2. Lesson Objectives <ul><li>What is respiration? </li></ul><ul><li>Aerobic & Anaerobic respiration </li></ul><ul><li>To show respiration in an animal </li></ul><ul><li>Internal vs external respiration </li></ul><ul><li>Breathing mechanisms </li></ul><ul><li>Gaseous exchange in lungs </li></ul><ul><li>Lung capacity </li></ul>
  3. 3. Why do living organisms respire? Light  chemical energy ultimate source of energy (light) (stored in organic molecules) protein fat carbohydrate respiration photosynthesis  energy
  4. 4. Respiration glucose + oxygen  carbon dioxide + water + energy Definition: Respiration is the oxidation of food substances with the release of energy in living cells carbon dioxide + water  glucose + oxygen light energy chlorophyll Photosynthesis: in living cells
  5. 5. Why respire? <ul><li>Uses of energy </li></ul><ul><li>Protein synthesis from a.a </li></ul><ul><li>Cell division </li></ul><ul><li>Heartbeat </li></ul><ul><li>Breathing (respiratory movements) </li></ul><ul><li>Muscular contractions </li></ul><ul><li>Active transport </li></ul><ul><li>Nerve impulse transmission, etc. </li></ul>
  6. 6. Aerobic vs Anaerobic respiration
  7. 7. Aerobic respiration ( in the presence of O 2 ) glucose + oxygen  carbon dioxide + water + energy in living cells Anaerobic respiration ( in the absence of O 2 ) Glucose  ethanol + CO 2 + energy partial breakdown Energy yield is smaller c.t. aerobic respiration
  8. 8. Alcoholic fermentation raising of bread smell Qn: Yeast is able to respire aerobically and anaerobically. How do we make them respire anaerobically? Glucose  ethanol + CO 2 + energy yeast
  9. 9. Olympics (400m relays) 1) aerobically 2) anaerobically
  10. 10. Anaerobic respiration in muscles Start End respire aerobically panting (remove CO 2 ; take in O 2 ) respire anaerobically (to meet energy demands; for short periods) (O 2 abundant) (less O 2 ) (less O 2 ) (less O 2 ) (shortage of O 2 ) Energy output max. Heavy breathing Extra energy produced (O 2 debt)
  11. 11. Changes in muscles during vigorous contractions
  12. 12. Anaerobic respiration in muscles glucose  lactic acid + energy Insufficient O 2 (vigorous muscle contraction) accumulation fatigue (high conc. of lactic acid) Muscle are said to incur an O 2 debt
  13. 13. During the race… <ul><li>muscular contractions are so vigorous that maximum aerobic respiration is unable to produce energy fast enough to meet energy demands </li></ul><ul><li>If vigorous muscular contractions continue, extra energy has to be produced by anaerobic respiration </li></ul><ul><li>Lactic acid is formed in the process </li></ul><ul><li>The small amount of energy released in anaerobic respiration, together with that produced in aerobic respiration, is sufficient to keep the muscles contracting </li></ul><ul><li>The muscles incur an O 2 debt </li></ul><ul><li>Lactic acid concentrations build up slowly in the muscles and eventually become high enough to cause fatigue and muscular pains </li></ul>
  14. 14. During rest… Muscles (lactic acid) Liver lactic acid -> energy oxidised lactic acid transported to Glucose lactic acid -> glucose ready to go glucose transported to
  15. 15. During rest… <ul><li>the breathing rate continues to remain fast for some time to provide sufficient O 2 to repay the O 2 debt </li></ul><ul><li>Lactic acid is removed from the muscles and transported to the liver </li></ul><ul><li>In the liver, some of the lactic acid is oxidized to produce energy to convert the remaining lactic acid into glucose </li></ul><ul><li>When the lactic acid is used up, the O 2 debt is paid </li></ul><ul><li>Glucose is then transported back to the muscle and the body is now ready for another race </li></ul>
  16. 16. How do we know if organisms respire?
  17. 17. 10.1 To show respiration in an animal Live cockroach Dead cockroach (soaked in formalin to prevent decay) Leave for a few hours
  18. 18. To show respiration in an animal Live cockroach Dead cockroach (soaked in formalin to prevent decay) After a few hours Note time taken for candle flame to go off
  19. 19. 10.2 To find out whether CO 2 is given off during respiration Hydrogen carbonate indicator Predict the likely observations from the experiment (red) (yellow) CO 2 present CO 2 absent
  20. 20. 10.2 To find out whether CO 2 is given off during respiration ( absorbs CO 2 ) ( chalky; presence of CO 2 ) ( ensures CO 2 absent )
  21. 21. 10.3 To find out whether carbon dioxide is given off during fermentation ( creates anaerobic environment ) ( turns chalky; presence of CO 2 ) (bubbles of CO 2 evolving)
  22. 22. 10.4 To find out whether heat is produced during respiration ( preservative + kills bacteria ) ( preservative + kills bacteria )

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