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active transport

n.
1.transport of a substance (as a protein or drug) across a cell membrane against the concentration gradient

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    Idiom of the Day

    hang one's hat (somewhere)
    to live or take up residence somewhere
    I want to move and hang my hat in a small town somewhere.



    1.
    The horse's ________ needs to be brushed daily.

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    Due to the many nerve endings in the sole and digits of the human foot, the sensations produced by sucking or licking the feet can be pleasurable.      .. More >>
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