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How do discs, like the one in the accompanying figure, commonly store items?
Isotonic Solution
Solution that is equal in solute concentration to that of the cytoplasm of a cell; causes cell to neither lose nor gain water by osmosis.
Solute Concentration
A measure of the amount of a solute that is dissolved in a solvent, determining the solute's proportion in a solution.
Selectively Permeable Membrane
A membrane that only allows specific molecules or ions to pass through it by active or passive transport.
Osmosis
The movement of water molecules through a selectively permeable membrane from a region of lower solute concentration to a region of higher solute concentration.
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