Cell Transport

    Cards (5)

    • What is simple diffusion?
      The NET movement of molecules from a 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
    • 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.
    • Define 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.
    • Percentage change calculation.
      % change = (final mass - initial mass)/initial mass x 100