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Describe the process of active transport, in your own words. I know what Active Transport is, but what is the process of it?

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Active transport is the movement of a chemical through a membrane against the concentration gradient.  Chemicals naturally move from areas of high concentration to low concentration so active transport in the opposite direction requires the use of energy.  One way that this actually occurs is through the use of transport proteins that are embedded in a cell membrane.  The proteins can chemically recognize a specific substrate and move that substrate along the protein through the membrane and out the other side.  The energy consumed during this process is ATP used by the protein to physically move the substrate against the concentration gradient.

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