What does active transport mean?
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The movement of ions or molecules across a cell membrane into a region of higher concentration, assisted by enzymes and requiring energy.
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Active transport is the process by which a substance is transported from one side of membrane to another side of membrane with help of special transporters in exchange for ATP against a concentration gradient.
Explanation:
Active transport is required to transport substances against concentration gradient, like in producing a membrane potential, or actively absorbing a substrate from intestine or soil. This active transport uses ATP as their source of energy, and act as molecular pumps. For example, Na K ATPase pump is an active transporter.
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