1. Microorganisms

2. Cell Membrane

3. - aka “Plasma Membrane” and “Fluid Mosaic Membrane” -All cells have cell membranes -Functions: a.Controls what enters and exits the cell to maintain an internal balance called homeostasis b.Provides protection and support for the cell TEM picture of a real cell membrane.

6. Carbohydrate Chain Protein Hydrophobic tails Hydrophilic heads Phospholipid Bilayer

7. Cellular Transport The movement of substances across the cell membrane.

8. 1. Passive Transport - cell doesn’t use energy - molecules move from HIGH  Low concentration 2. Active Transport - cell uses energy - molecules move from low  HIGH concentration Types of Cellular Transport high low This is gonna be hard work!! high low Weeee!! !

9. 3 Types of Passive Transport

11. 1.Diffusion: movement of particles from an area of high concentration to an area of low concentration. (High to Low) Equilibrium: when all particles are evenly spaced out http://bio.winona.edu/berg/Free.htm

12. 3. Osmosis: diffusion of water through a selectively permeable membrane Water moves freely through pores. Solute (green) to large to move across.

13. Effects of Osmosis on Life Water is so small and there is so much of it the cell can’t control it’s movement through the cell membrane.

14. Hypotonic Solution Hypotonic: The solution has a lower concentration of solutes and a higher concentration of water than inside the cell. (Low solute; High water) Result: Water moves from the solution to inside the cell): Cell Swells and bursts open (cytolysis)! Osmosis Animations for isotonic, hypertonic, and hypotonic solutionsOsmosis

15. Hypertonic Solution Hypertonic: The solution has a higher concentration of solutes and a lower concentration of water than inside the cell. (High solute; Low water) Result: Water moves from inside the cell into the solution: Cell shrinks (Plasmolysis)! Osmosis Animations for isotonic, hypertonic, and hypotonic solutionsOsmosis shrinks

16. Isotonic Solution Isotonic: The concentration of solutes in the solution is equal to the concentration of solutes inside the cell. Result: Water moves equally in both directions and the cell remains same size! (Dynamic Equilibrium) Osmosis Animations for isotonic, hypertonic, and hypotonic solutionsOsmosis

17. What type of solution are these cells in ? A CB HypertonicIsotonicHypotonic

18. Microorganisms

19. Osmosis

20. 2. Facilitated diffusion: diffusion of larger particles through transport proteins in the membrane

21. 3 Types of Active Transport

22. Microorganisms

23. 1. Protein Pumps -transport proteins that require energy to do work (low  High)

24. Microorganisms

25. 2. Endocytosis: taking bulky (large) materials into a cell by “pinching” the membrane and forming a vesicle.

26. 3. Exocytosis: Forcing large materials out of cell by forming a vesicle.

27. Cell Membrane