Transport in cells

• Diffusion

  • Diffusion describes when there is a net movement of particles from an area where their concentration is higher to an area where their concentration is lower.
• Active transport

  • Active transport is the net movement of particles against a concentration gradient.
  • This means that energy is needed for active transport to happen.
• Osmosis

  • Osmosis is a specific type of diffusion in which only water molecules move.
  • Osmosis requires a partially permeable membrane.