Cell Transport

    Cards (6)

    • What is simple diffusion?
      The net movement of molecules from an area of high concentration to an area of low concentration down a concentration gradient
    • What molecules enter and leave cells via simple diffusion through the cell membrane?

      Small molecules e.g. oxygen, water, glucose, amino acids
    • What factors affect the rate of diffusion?
      Temperature
      Concentration gradient
      Surface area of cell membrane
    • Define osmosis
      The net movement of water molecules from an area of high water concentration to an area of low water concentration through a partially permeable membrane
    • What is active transport?
      The movement of molecules across a cell membrane from an area of low concentration to an area of high concentration, against the concentration gradient, using energy
    • How is a percentage change in mass calculated?
      (final mass - initial mass/initial mass ) x 100
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