Final answer:
In an isotonic solution, the cell retains its normal shape. In a hypotonic solution, the cell swells and may rupture. In a hypertonic solution, the cell shrinks and shrivels.
Step-by-step explanation:
In an isotonic solution, the amount of dissolved material is equal both inside and outside of the cell. Water still flows in both directions, but an equal amount enters and leaves the cell. The cell retains its normal shape in this environment.
In a hypotonic solution, the environment outside of the cell has less dissolved material than inside of the cell. Water will flow into the cell, causing it to swell and potentially rupture.
In a hypertonic solution, the environment outside of the cell has more dissolved material than inside of the cell. Water will leave the cell, causing it to shrink and shrivel.