Diffusion

• What is diffusion?

  Diffusion is the movement of particles from a high concentration to a low concentration
• Where can diffusion happen?

  It can happen in both liquids and gases
• Where can diffusion take place through?


  Cell membranes
• What is meant by a partially permeable membrane?

  Only some molecules can diffuse through it. For example, water, gluclose and amino acids
• What cant diffuse through a partially permeable membrane ?

  Larger molecules like, Proteins and starch
• What are the factors that affects the rate of diffusion?

  Concentration gradient, temperature and suraface area
• How does temperature affect the rate of diffusion?

  The higher temp gives the particles more energy so they move around quicker and diffuse quicker speeding up the diffusion proces
• How does the concentration gradient affect the rate of diffusion?

  The larger the conc grandient the higher the rate of diffusion
• How does SA affect the rate of diffusion?

  The larger the surafe area the higher the rate of diffusion
• Does it require energy from cells?

  No. Its a passve process