Diffusion

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  • Diffusion
    • substances have to pass through the cell membrane to get into or out of a cell.
    • Diffusion occurs when particles spread
    • They move from a region where they are in high concentration to a region where they are in low concentration.
    • Diffusion happens when the particles are free to move.
    • diffusion does not occur in solids
    • Particles diffuse down a concentration gradient, from an area of high concentration to an area of low concentration
      • This is how the smell of cooking travels around the house from the kitchen, for example

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