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<p>allows the specific ions that will fit into the channel to flow down their concentration gradient, equalizing the concentrations on either side of the cell membrane. Ion channels and ion transporters accomplish this via <a href="page.php?w=facilitated_diffusion">facilitated diffusion</a> which is a type of <a href="page.php?w=passive_transport">passive transport</a>. However, only ion transporters can also perform active transport, which involves moving ions against their concentration gradient. Using energy sources such as ATP, ion transporters</p><p>
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