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Chapter 10 Respiration Lesson 1 - Aerobic and Anaerobic Respiration and the Experiments
 

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 Chapter 10 Respiration Lesson 1 - Aerobic and Anaerobic Respiration and the Experiments Presentation Transcript

    • Respiration Chapter 10
    • Lesson Objectives
      • What is respiration?
      • Aerobic & Anaerobic respiration
      • To show respiration in an animal
      • Internal vs external respiration
      • Breathing mechanisms
      • Gaseous exchange in lungs
      • Lung capacity
    • Why do living organisms respire? Light  chemical energy ultimate source of energy (light) (stored in organic molecules) protein fat carbohydrate respiration photosynthesis  energy
    • 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
    • Why respire?
      • Uses of energy
      • Protein synthesis from a.a
      • Cell division
      • Heartbeat
      • Breathing (respiratory movements)
      • Muscular contractions
      • Active transport
      • Nerve impulse transmission, etc.
    • Aerobic vs Anaerobic respiration
    • 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
    • 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
    • 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 (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)
    • Changes in muscles during vigorous contractions
    • 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
    • During the race…
      • muscular contractions are so vigorous that maximum aerobic respiration is unable to produce energy fast enough to meet energy demands
      • If vigorous muscular contractions continue, extra energy has to be produced by anaerobic respiration
      • Lactic acid is formed in the process
      • The small amount of energy released in anaerobic respiration, together with that produced in aerobic respiration, is sufficient to keep the muscles contracting
      • The muscles incur an O 2 debt
      • Lactic acid concentrations build up slowly in the muscles and eventually become high enough to cause fatigue and muscular pains
    • During rest… Muscles (lactic acid) Liver lactic acid -> energy oxidised lactic acid transported to Glucose lactic acid -> glucose ready to go glucose transported to
    • During rest…
      • the breathing rate continues to remain fast for some time to provide sufficient O 2 to repay the O 2 debt
      • Lactic acid is removed from the muscles and transported to the liver
      • In the liver, some of the lactic acid is oxidized to produce energy to convert the remaining lactic acid into glucose
      • When the lactic acid is used up, the O 2 debt is paid
      • Glucose is then transported back to the muscle and the body is now ready for another race
    • 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 hours
    • 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
    • 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
    • 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 )
    • 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)
    • 10.4 To find out whether heat is produced during respiration ( preservative + kills bacteria ) ( preservative + kills bacteria )