Respiration

• What does cellular respiration do?(happens in living cells)

  Transfers energy to an organism from food
• Organism need energy for

  • Movement
  • Keep warm
  • Chemical reactions
• Why is respiration an exothermic chemical reaction

  Gives out energy
• When do cells use aerobic respiration

  When enough oxygen is available
• In aerobic respiration what does glucose completely oxidised mean?

  All energy from glucose is released
• Aerobic respiration Equation ?

  glucose + oxygen -> carbon dioxide + water (and energy)
• Why do cells use anaerobic respiration ?

  If their isn't enough oxygen
• In anaerobic respiration in muscles glucose trust into lactic acid what happens to glucose?

  Not completely oxidised
• Anaerobic respiration equation

  Glucose -> lactic acid
• Glucose isn't completely oxidised so less energy is released than aerobic respiration
• What is fermentation

  Anaerobic respiration in yeast cells
• Equation for fermentation?

  Glucose -> ethanol + carbon dioxide
• What is fermentation useful for?

  Making bread and alcoholic drinks