B2 Aerobic and Anaerobic Respiration

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  • Created by: EllenMIW
  • Created on: 31-12-15 19:38
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  • Aerobic and Anaerobic Respiration - B2
    • Aerobic respiration
      • Chemical reactions inside cells controlled by enzymes
      • Glucose +oxygen - carbon dioxide + water (+energy)
      • Takes place continuously in plants and animals
      • Energy produced used...
        • To build larger molecules from smaller ones
        • To enable muscles to contract in animals
        • To maintain a steady body temp in cold in birds and mammals
        • To build up sugars, nitrates and other nutrients into amino acids in plants
    • Exercise
      • Changes
        • Heart rate increases
        • Rate and depth of breathing increases
        • Increase rate of blood flow to muscles, so increase supply of sugar and oxygen, increasing rate of CO2 removal
      • Stored glycogen converted back to glucose
    • Anaerobic respiration
      • If insufficient oxygen is reaching the muscles
      • The incomplete breakdown of glucose
      • Produces lactic acid
        • Oxygen debt has to be repaid in order to oxidise lactic acid into water and carbon dioxide
        • Causes muscle fatigue


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