Cellular respiration

• Energy

  The ability to do work
• Respiration


  The process that releases energy from food
• Cellular respiration


  • Digestive system breaks food down into sugar glucose
  • Oxygen/glucose are transported by the circulatory system to the cells
  • Chemical reaction happens in the mitochondria: oxygen and glucose react to produce energy
  • Energy is used for function/growth
  • Carbon dioxide/water produced are waste products
• Oxygen and glucose

  React to produce energy
• Biological process is a process that is essential for life
• Chemical process is a process that involves forming or breaking the chemical bonds between the atoms in a substance
• Aerobic respiration


  The process that releases energy from food when oxygen is present
• Aerobic respiration


  Glucose + oxygen -> carbon dioxide + water + energy
• Anaerobic respiration

  The process that releases energy from food when oxygen is absent
• Anaerobic respiration in animals

  Glucose -> Lactic acid + energy
• Anaerobic respiration in yeast

  Glucose -> Ethanol + carbon dioxide + energy
• Aerobic respiration can produce 15 times more energy than anaerobic respiration
• Factors that can affect the rate of respiration

  • Availability of glucose
  • Availability of oxygen
  • Temperature
• Enzymes have an optimum temperature (40°C). The rate of respiration will increase until the optimum temperature is reached and then decrease
• The mitochondria in the cells use oxygen and glucose to create energy
• The respiratory system and circulatory system transport glucose and oxygen into cells for cellular respiration