Using the example of a cell in a sugar solution, explain what is meant by an isotonic solution.
Cells placed in an isotonic solution will neither shrink nor swell, since there is no net gain or loss of water.
What is an isotonic solution?The rate of water molecules entering and exiting the cell will remain constant and be equal.
Isotonic solutions, in which the concentration of sugar solution is the same as the concentration of water in the plant cell, will result in no net movement of water across the plasma membrane.
In an isotonic solution, a red blood cell will not experience any net water movement.
There won't be a net migration of water towards the solution or the cell, since the concentration of the solute and water are identical both within and outside the cell.
Therefore, no net gain or loss of water from the cell in isotonic solutions.
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