Diffusion, Osmosis, & Active Transport

1. Diffusion, Osmosis, & Active Transport

2. What is the other name for the Cell Membrane? • Fluid Mosaic Model

5. Passive Transport • Requires no energy • Flows “downhill” from an area of higher concentration to an area of lower concentration.

6. Diffusion 1. Diffusion requires no energy 2. It is the movement of molecules from a high concentration to a low concentration

7. Diffusion

8. Diffusion

9. Facilitated Diffusion • Facilitated Diffusion uses a membrane protein to get molecules across the membrane • It is still diffusion so it requires no energy and moves from high to low concentration

10. Facilitated Diffusion

11. Osmosis • Osmosis is the movement of water across a semi permeable membrane • Osmosis requires no energy

12. Osmosis

13. Osmosis

14. Osmosis

15. Hypertonic Solution

16. Hypotonic Solution

17. Types of Transport

18. Active Transport • Active transport requires energy • Moves molecules from low concentration to high concentration • Requires use of special membrane proteins

19. Active Transport • Active transport also includes endocytosis and exocytosis • Endocytosis is when molecules are brought in to the cell through movement of the membrane • Exocytosis is when molecules are pushed out of the cell due to movement of the membrane

20. Active Transport

21. Active Transport

22. Na-K Ion Pump (Active)

23. Endocytosis

24. Endocytosis

25. Endocytosis - Pinocytosis

26. Endo & Exo Cytosis

27. Endo & Exo Cytosis

28. Exocytosis

29. Exocytosis

30. Exocytosis