Respiration GCSE

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  • Respiration GCSE
    • Aerobic Respiration (uses oxygen)
      • A series of reactions where energy is released from glucose
      • glucose + oxygen = carbon dioxide + water
      • Most of the reactions involved occur in the mitochondria
    • Anaerobic Respiration
      • This may occur during exercise as not enough oxygen reaches the muscles to carry out aerobic respiration
      • This results in an incomplete breakdown of oxygen
      • Muscles become fatigued during exercise due to lactic acid
      • glucose = carbon dioxide + water
      • Lactic acid is removed by blood flowing through
      • Less energy is produced by anaerobic respiration
        • This is because glucose isn't completely broken down
      • It causes an oxygen debt
        • More oxygen is needed to oxidise lactic acid to carbon dioxide + water
    • How the energy from Respiration's used:
      • To build up larger molecules from smaller ones
      • To enable animals muscles to contract, so they are able to move
      • To keep there body at a constant temperature
        • For instance if surroundings are too cold
    • Exercise
      • During exercise a lot more energy i9s required
      • Glucose and oxygen are used up a lot more quickly
        • Oxygen is supplied more quickly to meet this demand by increased heart rate/ breathing rate
    • Plants store glycose as starch
    • Animals store glucose as glycogen


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