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18 April, 11:22

Give an analogy of active and passive transport

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  1. 18 April, 11:41
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    The movement of molecules through membranes based only on concentrations is passive, requiring no energy expendature such as water moving through a membrane as in osmosis.

    Active transport requires an energy expenditure and selectively moves substances against a concentration gradient. For instance sodium is transported into many cells by carriers in the cell membrane and requires ATP as an energy source.
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