Respiration

• Respiration


  A process that supplies the energy needed for biological processes
• Respiration


  • Exothermic reaction
  • Releases energy
  • Takes place continually in all living cells
• Aerobic respiration


  1. Glucose reacted with oxygen gas

  2. Produces carbon dioxide and water

  3. Releases energy
• Aerobic respiration


  Glucose molecule has been fully oxidized
• Anaerobic respiration in muscles

  1. Glucose converted to lactic acid

  2. Does not require oxygen
• Anaerobic respiration


  • Releases much less energy than aerobic respiration
  • Oxidation of glucose is incomplete
• Anaerobic respiration in plants and yeast

  1. Glucose converted to ethanol and carbon dioxide

  2. Does not require oxygen
• Fermentation


  • Anaerobic respiration in yeast cells
  • Used to make alcoholic drinks and bread