Respiration

• Respiration takes place in the mitochondria, continuously releasing energy used for: heat, growth, reproduction, each transport
• Anaerobic respiration in animals:

  glucose —>energy + lactic acid
• Exercise increases


  The rate of breathing
• Exercise increases


  The depth of breathing
• Respiration requires oxygen and produces carbon dioxide
• When blood takes the oxygen from the lungs, a large volume of air is needed. The increased depth and rate of breathing allows for this
• Fermentation produces hydrogen and carbon dioxide
• Investigating respiration is how the body brings in the oxygen and gets rid of the carbon dioxide
• Larger volumes of air and increases the rate of gas exchange
• Respiratory Membrane


  • Large surface area
  • Thin
  • Moist
  • Permeable
  • Good blood supply
  • Diffusion gradient
• Functions of Respiratory Membrane


  • Large surface are —> Allows for gas exchange to occur
  • Thin—> Allows gases to diffuse quickly over a short distance
  • Moist—> Allows gases to dissolve in solution
  • Permeable—>Allows gases to pass through easily Good blood supply —> Allows dissolved gases to be transported away from the lung
  • Diffusion gradient —> Allows gas molecules to move from areas of high concentration to areas of low concentration
• Respiration is a

  endothermic reaction —> it gives out heat
• The equation for respiration is glucose + oxygen → carbon dioxide + water + energy (ATP)
• Anaerobic respiration in yeast:

  glucose —> energy + alcohol + carbon dioxide
• Investigating fermentation