Membrane Transport

3. membrane protein that forms a passageway for molecules to move down their concentration gradient
6. any transport process that does not require energy
7. hydrophilic head of phospholipid
9. energy used in active transport
10. protein that helps water move across the membrane
11. bulk movement of materials into the cell
12. water loving
17. any transport process that moves materials against the concentration gradient
20. phospholipid heads are composed of _
21. movement of any substance from high to low concentration
22. cells in saltwater will do this
23. movement of material with the help of a protein from high concentration to low concentration
24. phospholipids arrange this way when placed in water
25. cells in pure water will do this

1. the cell membrane helps the cell control into internal environment or maintain _
2. main component of the cell membrane
4. water fearing
5. phospholipid tails are composed of _
8. hydrophobic tail of phospholipid
13. membrane component that functions as ID badges
14. bulk movement of materials out of the cell
15. movement of water across the cell membrane
16. membrane protein that moves molecules against their concentration gradient
18. allowing some things but not all things the pass through the membrane
19. membrane component that give the membrane flexibility and fluidity