Answer :
Final answer:
Tonicity is a concept in biology that defines the amount of solute in a solution, often compared between extracellular and intracellular fluids.
Explanation:
Tonicity describes the amount of solute in a solution, represented by its osmolarity. It involves a comparison between two solutions, typically the extracellular and intracellular fluids of cells. Hypotonic, isotonic, and hypertonic are terms used to describe these relationships.
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