Anaerobic respiration

• Anaerobic respiration:

  Breaking down glucose without oxygen
• It occurs In the cytoplasm
• Occurs when there’s not enough oxygen , like during exercise
• Why’s it important?

  Provides energy when oxygen is low

  Yeast - used in brewing and bread- making
• What are problems with anaerobic respiration 


  Produces less energy that aerobic respiration

  In animals lactic acid builds up, causing muscle fatigue

  oxygen is needed to break down lactic acid ( oxygen debt)
• Anaerobic respiration releases less energy so it’s less efficient
• Products in animals :

  Lactic acid
• Products in plants/ yeast

  Ethanol and CO2
• Word equation for animals

  glucose —> Lactic acid + (energy)
• Word equation for plants and yeast

  glucose —> ethanol + CO2 + (energy)
• When there’s a shortage of oxygen muscle cells respire anaerobically
• Why’s does anaerobic respiration release less energy?

  The glucose isn’t fully oxidised - incomplete
• Anaerobic respiration in plant and yeast cells:

  Glucose —> ethanol + carbon dioxide
• Anaerobic respiration in yeast cells is called fermentation