1. Osmosis is the movement of water molecules across a selectively permeable membrane from an area of higher water concentration to an area of lower water concentration.
2. Water moves down the concentration gradient, from an area of higher water concentration to an area of lower water concentration.
3.
a. Isotonic: A solution in which the solute concentration is the same as that inside the cell.
b. Hypertonic: A solution with a higher solute concentration than the cell.
c. Hypotonic: A solution with a lower solute concentration than the cell.
4.
- Isotonic: solution in which the solute concentration is the same, condition that animal cells require, plant cell with good turgor pressure
- Hypertonic: solution with a higher solute concentration, plant cell loses turgor pressure (Plasmolysis), red blood cell bursts (cytolysis)
- Hypotonic: solution with a lower solute concentration, condition that plant cells require, solution with a high water concentration
5.
- First image: Hypertonic
- Second image: Isotonic
- Third image: Hypotonic
- Fourth image: Hypotonic
- Fifth image: Isotonic
- Sixth image: Hypertonic
6.
- The type of transport represented is active transport.
- The energy being used is ATP.
- The movement is occurring against the concentration gradient (from low to high concentration).
7.
- Color the internal environment of the cell yellow.
- Color and label the transport proteins red and the substance being moved blue.
Parent Tip: Review the logic above to help your child master the concept of cell membrane and tonicity worksheet answer key.
