Respiration

• Respiration


  Process that transfers energy from glucose molecules
• Respiration is an exothermic reaction that continuously occurs in living cells
• Cellular respiration


  Breaking apart glucose molecules to release the energy trapped inside
• How organisms use energy

  • Building up larger molecules from smaller ones (e.g. amino acids to proteins)
  • Muscular contraction for movement
  • Maintaining body temperature
• Metabolism


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


  • More common type
  • Takes place whenever there is enough oxygen
  • Most efficient way to transfer energy from glucose
  • Takes place within mitochondria
• Aerobic respiration


  Glucose + Oxygen → Carbon dioxide + Water
• Anaerobic respiration


  Respiration without oxygen
• Anaerobic respiration


  Glucose → Lactic acid
• Anaerobic respiration is less efficient as it involves incomplete breakdown of glucose and leads to lactic acid buildup
• Anaerobic respiration in plants and yeast

  • Glucose is converted to ethanol and carbon dioxide instead of lactic acid
  • In yeast, this process is called fermentation and is used to make bread, beer, and wine