Diffusion, Osmosis and Active Transport

Diffusion, Osmosis and Active Transport

1. Diffusion

   • Movement of particles from an area of high concentration to an area of low concentration.
   • Doesn't require energy
   • Molecules

2. Osmosis

   • Movement of water from an area of high concentration to an area of low concentration.
   • Doesn't require energy
   • Water
   • Through a partially permeable membrane

3. Active Transport

   • Movement of particles against the concentration gradient.
   • Requires energy (from respiration)
   • Essential molecules

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