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Cards (26)

  • Is diffusion active or passive?

    passive
  • what is the definition of diffusion?

    The net movement of particles (molecules or ions) from an area of higher concentration to an area of lower concentration
    • down a concentration gradient
  • Which ways will molecules diffuse?

    both ways, BUT the net movement will be to the area of lower concentration.
    • This continues until particles are evenly distributed throughout the liquid or gas
  • What is the CONCENTRATION GRADIENT?

    The path from an area of higher concentration to an area of lower concentration gradient. Particles diffuse DOWN a concentration gradient.
  • Diffusion is a PASSIVE PROCESS. What does this mean?

    No energy is needed for it to happen
  • What can particles diffuse across?

    cell membranes, as long as they can move freely through the membrane
  • What is simple diffusion?

    when molecules diffuse directly through a cell membrane