1. Cell Transport chap. 7-3 https://www.pinterest.com/pin/225039312606126463/

2. I. Cell Membrane 1) POLAR ends face INSIDE & OUTSIDE cell [where water is] 2) NONPOLAR tails face each other inside bilayer [to avoid water]

3. Outside of cell Inside of cell (cytoplasm) Cell membrane Proteins Protein channel Lipid bilayer Carbohydrate chains

4. http://www.bioteach.u bc.ca/Bio- industry/Inex/

5. 3) FUNCTION: SELECTIVE PERMEABILITY = allows only certain materials to go into & out of cell

6. a. Why doesn’t the cell membrane let everything through? HOMEOSTASIS! - Cells maintain a stable environment by controlling what enters & leaves.

7. II. Cellular Transport – Two Major Types (Passive & Active Transport) 1.Passive Transport = moves molecules across cell mem. using NO ENERGY Movement going with the concentration gradient (normal flow)

8. 1.Diffusion – molecules move from HIGH conc. to LOW conc. a. Small molecules: O 2, CO 2 b. Slow process A. Types of Passive Transport

10. Passive Transport Video Clip https://www.pinterest.com/pin/225039312 606104881/ https://www.pinterest.com/pin/225039312 606104881/

12. PROBLEM for Cells? Cell membranes are SELECTIVELY PERMEABLE

13. 2. Facilitated Diffusion – movement of molecules with help of a carrier protein

15. a.Moves large molecules like Glucose and Fructose (C 6 H 12 O 6 ) b. Faster than diffusion

16. http://www.sirinet.net/~jgjohnso/homeostasis.html

18. 3. Osmosis – diffusion of WATER across cell membrane * H 2 O moves to area with LESS WATER

19. a. Direction of Osmosis: 1) Hypotonic Solution = H 2 O moves INTO cell & CELL EXPANDS

20. 2) Hypertonic Solution = H 2 O moves OUT OF cell & CELL SHRINKS

21. 3) Isotonic Solution = H 2 O moves INTO & OUT OF cell & cell stays NORMAL SIZE

23. * EQUILIBRIUM = concentration of molecules is same everywhere * Molecules never stop moving – even at equilibrium

24. 2. 2 nd Type of Transport  Active Transport 1.moves molecules across cell membrane using ENERGY

25. B. Types of Active Transport 1. Transport Proteins: in membrane- move substances from low to high conc. (opposite of how it wants to move)

26. 2. Endocytosis = cell surrounds & ingests materials from OUTSIDE to INSIDE cell using VESICLES

27. http://www.sirinet.net/~jgjohnso/homeostasis.html

28. a. Steps: 1) membrane folds in & forms pocket 2) Pocket closes & pinches off in cell  vesicle 3) vesicle fuses w/ organelles to release contents

29. b. Two Types of Endocytosis: 1)Phagocytosis – LARGE particles (food) or whole CELLS (bacteria) into cell 2) Pinocytosis – large amounts of liquids/ fluids into cell

30. 3. Exocytosis –releases large amounts of material to the OUTSIDE of the cell using VESICLES

31. a. Steps: 1)Vesicle forms, travels to & fuses w/ cell mem. 2)Vesicle opens to outside & releases contents

32. http://www.sirinet.net/~jgjohnso/homeostasis.html

33. Video clip