Aerobic and Anaerobic Respiration

• Cellular respiration is an exothermic reaction which transfers energy from glucose and is continuously occurring in living cells
• Cellular respiration


  Breaking apart glucose molecules to release the energy that's trapped inside
• How organisms use their energy

  • Building up larger molecules from smaller ones (e.g. combining amino acids to form proteins)
  • Muscular contraction for movement
  • Maintaining body temperature
• Energy is needed for loads of reactions in our cells, most of which are catalyzed by enzymes
• Metabolism


  All the chemical processes that occur within a living organism in order to maintain life
• Aerobic respiration


  • More common type, takes place whenever there's enough oxygen, most efficient way to transfer energy from glucose, takes place continuously in both plants and animals, occurs within mitochondria
• Aerobic respiration


  Glucose + Oxygen → Carbon dioxide + Water
• The equation for aerobic respiration is the opposite of the equation for photosynthesis
• Anaerobic respiration


  • Respiration without oxygen, used when there is not enough oxygen to keep up with the demands of aerobic respiration, incomplete breakdown of glucose, leads to lactic acid buildup
• Anaerobic respiration in muscles 


  Glucose → Lactic acid
• Anaerobic respiration in plants and yeast

  • Glucose is converted to ethanol and carbon dioxide instead of lactic acid, used in industry to make bread, beer, and wine
• Anaerobic respiration in plants and yeast

  Glucose → Ethanol + Carbon dioxide
• Anaerobic respiration in yeast cells is called fermentation and has economic importance in the manufacture of bread and alcoholic drinks.
• As the oxidation of glucose is incomplete in anaerobic respiration much less energy is transferred than in aerobic respiration.
• The energy transferred supplies all the energy needed for living processes
• aerobic uses a great deal of energy this is because the glucose molecule has been fully oxidised
• Aerobic respiration symbol frmula:

  c6H12O6+O2 ——>CO2 +H2O
• Anaerobic respiration releases much less energy than aerobic respiration ( the oxidation of glucose in an anaerobic respiration is incomplete )