Active Transport

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  • Created by: Olivia
  • Created on: 30-04-13 13:45

Active Transport is the opposite of diffusion

Active tranport is the movement of particles against a concentration gradient (i.e. from an area of low concentration to an area of high concentration) using energy released from respiration

Active transport, like diffusion and osmosis, is used to move substances in and out of cells. For example, active transport is used in the digestive system where there is a low concentration of nutrients in the gut but a high concentration of nutrients in the blood:

  • When there's a higher concentration of nutrients in the gut they diffuse naturally into the blood
  • BUT sometimes there's a lower concentration of nutrients in the gut than there is in the blood
  • This means thatv the concentration gradient is the wrong way. The nutrients should go the other way if…


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