Investigating Diffusion

By G Davidson


1. Diffusion does not include a selectively permeable membrane.

    True

    False

2. Osmosis does not involve a selectively permeable membrane.

    True

    False

3. If plant cells are placed in pure water they will become .

4. Plant cell walls are

    impermeable

    selectively permeable

    freely permeable

5. Unicellular animals have vacuoles to stop the from bursting.

6. Molecules will ALWAYS diffuse down a concentration gradient.

    True

    False

7. If potato cells are added to a solution of low water concentration they will

    gain weight

    lose weight

    stay the same weight

8. Unicellular animals rely on diffusion for the supply of which gas?

    

9. What word is used to describe a plant cell whose vacuole has shrunk and the cell membrane has been pulled away from the cell wall?

    

10. In the air sacs of our lungs, which gas(es) diffuse between the lungs and the blood?

    oxygen

    carbon dioxide

    oxygen and carbon dioxide

    none of the above