The concentration of sodium ions is lower in the cytoplasm of a heart muscle cell than it is in the extracellular fluid. By what mechanism does the cell maintain this difference?

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    facilitated diffusion
    osmosis
    endocytosis
    active transport

asked May 30, 2013 in Biology by anonymous
    

1 Answer

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active transport
answered May 31, 2013 by Bioshare ~Top Expert~ (34,070 points)

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