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Biology  /  Bio 0352  ·  Atom · ~20 seconds

"Isotonic Means the Same for Every Cell"

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Calling a solution isotonic without naming which cell it compares to drops the reference point the term depends on.

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A solution isotonic to a red blood cell is not automatically isotonic to a plant cell, since their osmolarities differ.

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Tonicity has no meaning stated alone — it describes a relation between one solution and one cell's cytoplasm.

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