1. Tonicity and Solutions
(Shrunken Cells are in Hypertonic solutions)
(Hippo Cells are in Hypotonic solutions)
Water molecules travel to the side of the cell membrane where there are less water molecules.

2. Tonicity
The ability of a solution to cause a cell to gain or lose water.
It mostly depends upon the concentration of a solute (salts, sugars, etc.) on both sides of the membrane.
Solute: Substance that is dissolved in the solvent to form a solution.
Solution: A liquid mixture.

3. Hypertonic Solutions
A solution that has a higher solute concentration to the tonicity of a cell.
Water moves out of the cell and the cell shrinks.

4. Isotonic Solutions
A solution that has an equal solute concentration to the tonicity of a cell.
Water moves in/out of the cell and the cell stays the same.

5. Hypotonic Solutions
A solution that has a lower solute concentration to the tonicity of a cell.
Water moves into the cell and the cell expands.

6. Comparing Hypertonic, Isotonic, and Hypotonic Conditions