Active Transport

notes on active transport, aqa as biology unit 1

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  • Created by: Stephanie
  • Created on: 12-05-12 15:09

Active Transport

Move substances against a concentration gradient using energy (ATP provided by Mitochondria).

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Carrier Proteins:

  • same as facilitated diffusion
  • but energy is used


  • A type of carrier proteins
  • Conc. gradient of one molecule is used to move the other against its own conc. gradient
  • e.g Sodium-glucose co-transport
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Glucose Absorption

1) Glucose moves into the intestinal epithelial cell with sodium via sodium-glucose co-transport protein.

2) Sodium removed by active transport in sodium-potassium pump - maintaining conc. gradient

3) Glucose then moves into blood by diffusion.

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