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What is an example of active transport?

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A common example of active transport, or moving a substance against its gradient, is the maintaining of a balance of sodium and potassium inside and outside a cell. Obviously too much sodium inside the cell would cause cell death. So, the cell must actively regulate how much sodium is allowed in through the membrane.
User Yuvaraj V
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active transport refers to a substance moving from areas in which it has low concentration to an area with high concentration, one example i guess is endocytosis, "the taking in of matter by a living cell by invagination of its membrane to form a vacuole"
User Serhiy Kulish
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