Cards (3)

  • Diffusion is the spreading out of particles resulting in a net movement from an area of high concentration to an area of low concentration
  • Rates of diffusion can be increased by :
    • increasing surface area
    • increasing concentration gradient
    • increasing temperature
    • decreasing distance particles need to travel
  • examples of diffusion
    • oxygen and carbon dioxide during gas exchange
    • urea diffuses out and into the blood plasma so it can be excreted in kidneys