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<p>cell pH and the concentration of ions, <a href="page.php?w=osmoregulation">osmoregulation</a>, storing <a href="page.php?w=amino_acids">amino acids</a> and <a href="page.php?w=polyphosphate">polyphosphate</a> and degradative processes. Toxic ions, such as <a href="page.php?w=strontium">strontium</a> , <a href="page.php?w=cobalt">cobalt</a>(II) , and <a href="page.php?w=lead">lead</a>(II)  are transported into the vacuole to isolate them from the rest of the cell.</p>

<p><big> Contractile </big></p>
<p>A <a href="page.php?w=contractile_vacuole">contractile vacuole</a></p><p>
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