2. Lesson Opening!!!

3. CYSTIC FIBROSIS Currently affects more than 30,000 children and young adults in US Disrupts epithelial cells Thick, sticky mucus Difficulty developing

4. Movement of Materials

5. The Cell Membrane

6. Plasma Membrane (aka Cell Membrane) Phosopholipid Bilayer Called the Fluid Mosaic Model Selectively Permeable

7. If a membrane is selectively permeable only certain things can pass through

8. The Cell Membrane is Selective: Things that passively cross: Non-Polar Molecules (Alcohols, Steroids) Small Molecules (Water) Things that actively cross: Polar Molecules (Ions) Large Molecules

9. Active (requires energy) Passive (no energy) Types of Transport

10. Osmosis Passive Passive Transport Diffusion Facilitated Diffusion

11. Passive Transport

12. Movement of materials that DOES NOT require energy (ATP)

13. What is happening here???

14. DIFFUSION The passive movement of material from an area of high concentration to an area of low concentration

15. Concentration The number of a substance in a specific area

16. High Concentration Low Concentration

17. Passive Transport High Concentration Low Concentration

19. Factors Affecting Diffusion Concentration—diffusion always goes from high concentration to low concentration Temperature—the higher the temperature, the faster diffusion occurs Molecular Size—the bigger the molecule, the longer diffusion takes

20. Osmosis Passive Passive Transport Diffusion Facilitated Diffusion

21. OSMOSIS The diffusion of water through a selectively permeable membrane

23. Facilitated Diffusion Diffusion that is helped by proteins in the membrane

24. Facillitated Diffusion

25. 3 TYPES OF SOLUTIONS These three different types of Solutions deal with Concentration Levels

26. Types of Solutions

27. Isotonic Solution No net movement of water in or out of the cell

28. Isotonic: Red Blood Cell stays the same

29. Hypotonic Solution Water moves from the solution into the cell causing it to swell or break (lysis)

30. Hypotonic: Red Blood Cell Expands

31. Hypertonic Solution The water moves out of the cell into the solution, causing the cell to shrink

32. Hypertonic: Red Blood Cell Shrinks

33. Types of Solutions

35. Another way to remember Isotonic Drink – you are fine Hypotonic Drink – you bloat up Hypertonic Drink – you shrivel up Isotonic Drink – you pee normally Hypotonic Drink – you pee all the time Hypertonic Drink – you never pee

36. Explain what is happening in this cartoon…

37. REAL LIFE TIDBIT Reverse Osmosis “Dasani” Apply external pressure to concentrated solution making water molecules diffuse from concentrated solution to dilute solution (leaves solutes / dirt on other side)

38. Osmosis Passive Passive Transport Diffusion Facilitated Diffusion

39. Osmosis Passive Passive Transport Diffusion Facilitated Diffusion You Should now have notes for all of these. Look at the Organization of Passive Transport

40. Membrane Movements Active Active Transport Pumps Endocytosis Exocytosis Requires Energy Sodium Potassium Pump

41. Active Transport Requires Energy

42. Active Transport Movement of materials from low concentration to high concentration using a protein carrier that requires energy (costs ATP)

43. Active Transport High Concentration Low Concentration

44. What is ATP again??? You do not need to copy this.

45. Sodium Potassium Pump Pumps sodium out and potassium into cells Important for Action Potentials

46. Active Transport

47. Endocytosis Process of bringing particles into a cell using extensions of the cellular membrane

48. ENDOCYTOSIS

49. Exocytosis Process of moving particles out of a cell using extensions of the cellular membrane (how wastes are excreted from cells)

50. EXOCYTOSIS

51. Endocytosis y Exocytosis

52. Phagocytosis The process of membrane folding that enables cells to bring “food” into the cell

53. Pinocytosis The process of membrane folding that enables cells to bring “water” into the cell

54. Did we get anything out of doing our lab???….