Respiration

• Aerobic respiration


  1. With oxygen

  2. Mitochondria is where it takes place

  3. Releases lots of energy
• Anaerobic respiration


  1. Without oxygen

  2. Cytoplasm is where it takes place

  3. Small amounts of energy released
• Organisms that respire


  • Animals
  • Plants
  • Fungi
  • Bacteria
• Organisms respire 24 hours a day
• Plants photosynthesise as well as respire
• Exercise


  1. Energy needed for muscle contraction

  2. Starts as aerobic respiration

  3. Then anaerobic respiration occurs
• Anaerobic respiration


  Glucose → lactic acid
• Anaerobic respiration

  • Plants + yeast: glucose → ethanol + carbon dioxide
• Fermentation:

  Used for bread making and brewing beer
• Metabolic rate


  Rate of reaction in cells
• Liver : Lactic acid breakdown
• Respiration


  Exothermic reaction: releases energy (ATP)
• Respiration: glucose + oxygen → carbon dioxide + water
• Anaerobic respiration:


  Animals: glucose --> lactic acid
• Plants: glucose --> ethanol + CO2