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What does non-penetrating mean?
and how does it related to tonicity?
What does tonicity mean?
Nonpenetrating = the solutes that cannot cross the membrane
Tonicity means what happens to the cell when you put it in water.
In a solution of mixed solutes, only the concentration of nonpenetrating solutes contributes to the tonicity of the solution
isotonic, hypotonic, hypertonic
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