Across
- 3. Active cell membrane surround particle and incloses it in vesicle to bring into cell in bulk.
- 9. Substance can cross membrane without energy input.
- 11. Move materials from low to high concentration but require energy.
- 12. Concentration of molecules.
- 13. Difference in concentration of molecules across a distance.
Down
- 1. Passive help from transport proteins to carry substance through cell membrane along concentration gradient.
- 2. Passive water molecules diffuse from high to low concentration.
- 4. Pressure exerted on cell wall.
- 5. Solution concentration is lower than inside cell (osmosis)
- 6. Solution concentration is higher than inside the cell (osmosis).
- 7. Active bulky material exits cell.
- 8. Solution inside and outside the cell are equal (osmosis).
- 10. Passive movement of molecules from an area of high concentration to low, most simple.