B4 - Diffusion, Osmosis and Active Transport

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  • Diffusion, Osmosis and Active Transport
    • Diffusion
      • Diffusion is the passive overall movement of particles from a region of their higher concentration to a region of their lower concentration
    • Osmosis is a specific case of Diffusion
      • Osmosis is the overall movement of water from a dilute to a more concentrated solution through a partially permeable membrane
      • A partially permeable membrane is just one allows certain substances to diffuse through it
      • Plants take in water by Osmosis. there is usually a higher concentration of water in the soil than there is inside the plant
    • Active Transport
      • Active transport is the overall movement of chemicals across a cell membrane from a region of lower concentration to a region of higher concentration using energy released by respiration

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