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Active transport: primary & secondary overview (article) | Khan Academy

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Electrochemical gradients and the membrane potential. Primary and secondary active transport. Na+/K+ pump.

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Active Transport - The A Level Biologist - Your Hub

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This is your stop for learning resources, extra info and essential dates and documents. I've scoured the world just to bring you, the A Level biologists, all you need to succeed and enjoy your Biology A Level.

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Substances need to move around the body of an organism. To do this they must cross Biological Membranes. There are a number of ways in which this may happen.

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BBC - GCSE Bitesize Science - Dissolved substances : Revision, Page 2

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A secondary school revision resource for AQA GCSE Triple Science about Biology: Dissolved substances.