Movement of Substances

4. Active transport involves protein ... embedded in the cell membrane
7. These plant cells provide structural support and prevent wilting
9. An example of a larger molecule that cannot freely diffuse across the cell membrane
11. The cellular process that releases energy for active transport
12. Active transport requires this to move particles against a concentration gradient
13. When a plant cell loses water in a strong sugar solution, it becomes plasmolysed or...
14. Active transport helps absorb the products of ... from the small intestine
15. Note that the movement of particles in diffusion is...
17. The part of the plant cell that shrinks when it loses water or expands when it gains water
19. Gas that diffuses from the alveoli into the blood
20. The more of this a solution contains, the lower its water potential

1. The type of energy that diffusing particles have
2. Scientists often describe osmosis using the term water ... instead of water concentration
3. What happens to an animal cell in distilled water because it lacks a cell wall
5. Active transport absorbs ... ions from the soil into root hair cells
6. Active transport moves particles ... a concentration gradient
8. Osmosis is the diffusion of ... molecules
10. In a strong sugar solution, an animal cell loses water and becomes shrivelled or...
16. Diffusion is a ... process as it doesn't require energy from the cell
18. A waste product that diffuses out of the liver cells into the blood