IB BIOLOGY- Passive and active transport

Passive and Active transport

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  • Created by: Rachael
  • Created on: 06-04-12 17:11

Passive transport

Diffusion- passive movement of particles from a region of higher concentration to a region of lower concentration, as a result of the random motion of particles.

Simple diffusion- through a partially permeable membrane

Facilitated diffusion- through channel proteins

Osmosis- the passive movement of water molecules from a region of lower solute concentration to a region of higher solute concentration, across a partially permeable membrane.

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Active transport

Active transport- the movement of substances across a membrane using energy from ATP

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