1. Cell Types

3. Phospholipids

4. Lipid Bilayer

7. Fluid Mosaic Model

9. Membrane Proteins

14. Membrane Protein Functions

15. Transport Across Membranes Small Molecules Simple Diffusion Facilitated Diffusion Active Transport Large Molecules Pinocytosis Phagocytosis Receptor-mediated endocytosis sugars amino acids nucleotides proteins viruses bacteria endocytosis exocytosis -

16. Diffusion Molecules move from areas of high concentrations to areas of low concentrations.

17. Diffusion Molecules move from areas of high concentrations to areas of low concentrations.

18. Simple Diffusion  Requires no energy  Requires no proteins  From high to low concentrations  Small, hydrophobic molecules O 2, CO 2, steroids

19. Simple Diffusion

20. Facilitated Diffusion  Requires no energy  Requires a carrier protein  From high to low concentrations

21. Facilitated Transport Molecules move across a membrane through carrier proteins from high to low concentrations.

22. Active Transport  Requires energy  Requires transport proteins  From low to high concentrations  Small, hydrophobic molecules

23. Active Transport

24. Transport Across Membranes Small Molecules Simple Diffusion Facilitated Diffusion Active Transport Large Molecules Pinocytosis Phagocytosis Receptor-mediated endocytosis sugars amino acids nucleotides proteins viruses bacteria endocytosis exocytosis -

25. Endocytosis / Exocytosis Phagocytosis Pinocytosis Receptor-mediated endocytosis

26. Endocytosis Phagocytosis

27. Endocytosis Phagocytosis

28. Amoebazoa -- Amoeba Endocytosis Phagocytosis

29. Endocytosis Pinocytosis

30. Endocytosis Pinoocytosis

31. Endocytosis Receptor-mediated Endocytosis

32. Endocytosis Receptor-mediated Endocytosis

33. Endocytosis Receptor-mediated Endocytosis

34. Endocytosis

36. Exocytosis

38. Endocytosis

39. Movement of Molecule Into and Out of a Cell Small Molecules Simple Diffusion Facilitated Diffusion Active Transport Large Molecules Pinocytosis Phagocytosis Receptor-mediated endocytosis sugars amino acids nucleotides proteins viruses bacteria endocytosis exocytosis &

40. Osmosis

46. Cell – Cell Junction Desomosomes = Adhesion Junctions

47. Cell-to-Cell Junctions desmosomes

48. Cell – Cell Junction Tight Junctions = Sealing Junctions

49. Cell-to-Cell Junctions tight junctions

50. Cell – Cell Junction Gap Junctions = Communication Junctions

51. Cell – Cell Junction

52. Cell Walls