Respiration

Respiration is the release of energy from glucose or another organic chemical. The chemical energy in glucose can be used to provide the energy required for growth, repair and movement. In fact most things you do require energy. Ask MRS GREN.

Aerobic Respiration is the normal form of respiration. It requires oxygen and releases the most energy from glucose. 1Mole of Glucose produces 2830 Kilojoules of energy. When we respire like this we have to breathe oxygen in and breathe carbon dioxide out. We also have to excrete (get rid of) the extra water in our urine.

Anaerobic Respiration also releases energy from glucose but not so much I mole of glucose will produce 118 Kilojoules of energy. When yeast respires anaerobically it produces carbon dioxide and alcohol. When we respire we produce lactic acid. Too much lactic acid poisons our muscles (you get cramp).

Summary:

Respiration:    

  1. is the release of energy from food,
  2. takes place in animal and plant cells.

Aerobic Respiration requires:   

  1. Glucose,
  2. Oxygen.

Anaerobic Respiration requires:     

  1. Glucose

Aerobic Respiration produces: 

  1. Energy,
  2. Carbon Dioxide,
  3. Water.

Anaerobic Respiration produces: 

  1. Energy (not as much),
  2. Carbon Dioxide,
  3. Lactic Acid or Alcohol.

I hope that you will be able to remember most of the facts on this page, but you must memorise the definition of photosynthesis. Write it on a small index card. Put the red words on one side of the card and the blue ones on the other. Add the card  to your revision pack.

Respiration: is the release of energy from glucose or another organic chemical.

Aerobic Respiration: requires oxygen.

Anaerobic Respiration: does not require oxygen and releases less energy.



Selected by the SciLinks program, a service of National Science Teachers Association. Copyright 1999 - 2002.

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4 Responses to Respiration

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