Respiration

• Respiration


  A process that supplies the energy needed for biological processes
• Respiration is an exothermic reaction because it releases energy and it takes place continually in all living cells
• Aerobic respiration


  • Glucose is reacted with oxygen gas to produce carbon dioxide and water, and it releases energy
• Aerobic respiration releases a great deal of energy because the glucose molecule has been fully oxidized
• Anaerobic respiration in muscles


  • Glucose is converted to lactic acid, and it does not require oxygen
• Anaerobic respiration releases much less energy than aerobic respiration because the oxidation of glucose is incomplete
• Anaerobic respiration in plant cells and yeast cells


  • Glucose is converted to ethanol and carbon dioxide, and it does not require oxygen
• Fermentation


  Anaerobic respiration in yeast cells, used to make alcoholic drinks and bread
• Yeast uses anaerobic respiration to produce ethanol and carbon dioxide, which is useful for making alcoholic drinks and bread