Respiration

• What should you be able to describe at the end of this video?

  Aerobic and anaerobic respiration
• Why is energy important in biology?

  For movement, warmth, and chemical reactions
• What is the process that supplies energy in cells?

  Cellular respiration
• What type of reaction is respiration?

  Exothermic reaction
• In which cells does respiration take place?

  All living cells
• What happens during aerobic respiration?

  Glucose reacts with oxygen to produce energy
• What is the word equation for aerobic respiration?

  Glucose + Oxygen → Carbon Dioxide + Water + Energy
• Why does aerobic respiration release a great deal of energy?

  Because glucose is fully oxidized
• What is the chemical symbol for glucose?

  C₆H₁₂O₆
• What is the chemical symbol for oxygen?

  O₂
• What is the chemical symbol for carbon dioxide?

  CO₂
• What is the chemical symbol for water?

  H₂O
• What happens when there is not enough oxygen for aerobic respiration?

  Cells carry out anaerobic respiration
• What do muscle cells require energy for?

  For contraction
• What is produced during anaerobic respiration in muscles?

  Lactic acid
• How does anaerobic respiration differ from aerobic respiration?

  It does not require oxygen
• What is the key fact about energy release in anaerobic respiration?

  It releases much less energy than aerobic respiration
• Why is the oxidation of glucose incomplete in anaerobic respiration?

  Because it does not use oxygen
• In which cells can anaerobic respiration occur?

  In plant cells and yeast cells
• What is the reaction for anaerobic respiration in yeast?

  Glucose is converted to ethanol and carbon dioxide
• What is anaerobic respiration in yeast called?

  Fermentation
• What is produced by fermentation in yeast that is useful for making alcoholic drinks?

  Ethanol
• How is carbon dioxide produced by fermentation useful in bread making?

  It creates bubbles causing the dough to rise
• What are the key differences between aerobic and anaerobic respiration?

  • Aerobic respiration requires oxygen; anaerobic does not.
  • Aerobic produces more energy; anaerobic produces less.
  • Aerobic produces carbon dioxide and water; anaerobic produces lactic acid or ethanol and carbon dioxide.
• What are the products of aerobic respiration?

  • Carbon dioxide
  • Water
  • Energy
• What are the products of anaerobic respiration in muscles?

  • Lactic acid
  • Energy
• What are the products of anaerobic respiration in yeast?

  • Ethanol
  • Carbon dioxide
  • Energy
• What are the applications of fermentation in yeast?

  • Production of alcoholic beverages
  • Leavening in bread making
• What is the significance of respiration in living organisms?

  • Provides energy for vital processes
  • Supports growth and maintenance