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Across 6. through the bilayer 8. the differing amount of substances between two areas (2 Words) 9. movement of water molecules 10. outside bilayer 11. outside the cell 13. a lipid with molecules attached to it 14. a cell with membrane-bound organelles 16. movement of molecules from a high concentration to a low concentration 19. a molecule on the outside the cell - helps cell communicate 20. the process of removing materials from the cell 21. structures that fit together 23. doesn't like water 24. likes water

Down 1. gives molecules more kinetic energy 2. model of cell membrane structure (3 Words) 3. body's protection against infections (2 Words) 4. a protein which can transport a molecule (2 Words) 5. passive movement of molecules helped by the carrier protein (2 Words) 7. movement of substances across membranes (2 Words) 12. stabilises fluidity of membrane 15. protein molecules on cell surface, used for signalling 17. the process of taking materials into a cell 18. phospholipids molecules form the basic structure 22. molecule used for 'energy currency' in organisms