1. Red=solute, white=solvent  Explain how the solute will move according to diffusion.  Draw a picture of what the cells will look like after diffusion ends.  What is the function of the Golgi Apparatus?

2. OBJECTIVES By the end of the period, all SWBAT…  Predict the movement of water using osmosis

3. Osmosis!  Key Point #1: Osmosis is the diffusion of water  Osmosis is a special kind of diffusion  The solvent (water) moves, instead of the solute (stuff)  But… why?!?!

4. Blue=water, Green=solute

6. So What?  Key Point #2: When cells are placed in hypertonic or hypotonic solutions, they change in volume  Hyper- = high  Hypo- = low  Iso- = same

7. Hypertonic Solution Outside Cell Inside Cell 70% water 50% water

8. Water Hypertonic Solution Outside Cell Inside Cell 70% water 50% water

9. Hypertonic Solution Water Inside Cell Outside Cell 60% water

10. Hypotonic Solution Outside Cell Inside Cell 22% water 40% water

11. Water Hypotonic Solution Outside Cell Inside Cell 22% water 40% water

12. Inside Cell Water Hypotonic Solution Outside Cell 30% water

13. Isotonic Solution Inside Cell Outside Cell 90% water

14. Red blood cells in action  THIS IS AWESOME! THIS IS AWESOME!

15. Whiteboards! Pull into groups and get your whiteboards, please!

16. Inside Cell Outside Cell 16% water 7% water

17. Outside Cell Inside Cell 54% water 88% water

18. Inside Cell Outside Cell 1% water

19. Hypo, hyper or isotonic? 40% water inside the cell and 10% water outside the cell. The cell membrane is permeable to water. 1)Is this hypertonic, hypotonic, or isotonic? 2)How will the water move, according to osmosis? 3)What will happen to the cell?

20. Hypo, hyper or isotonic? 10% water inside the cell and 90% water outside the cell. The cell membrane is permeable to water. 1)Is this hypertonic, hypotonic, or isotonic? 2)How will the water move, according to osmosis? 3)What will happen to the cell?

21. Hypo, hyper or isotonic? 55% water inside the cell and 55% water outside the cell. The cell membrane is permeable to water. 1)Is this hypertonic, hypotonic, or isotonic? 2)How will the water move, according to osmosis? 3)What will happen to the cell?

22. PAY ATTENTION!!!  20% SUGAR inside the cell and 22% SUGAR outside the cell. The cell membrane is permeable to water.

23. Hypo, hyper or isotonic? 20% sugar inside the cell and 22% sugar outside the cell. The cell membrane is permeable to water. 1)Is this hypertonic, hypotonic, or isotonic? 2)How will the water move, according to osmosis? 3)What will happen to the cell?

24. Hypo, hyper or isotonic? 80% sugar inside the cell and 80% sugar outside the cell. The cell membrane is permeable to water. 1)Is this hypertonic, hypotonic, or isotonic? 2)How will the water move, according to osmosis? 3)What will happen to the cell?

25. Hypo, hyper or isotonic? 9% sugar inside the cell and 1% sugar outside the cell. The cell membrane is permeable to water. 1)Is this hypertonic, hypotonic, or isotonic? 2)How will the water move, according to osmosis? 3)What will happen to the cell?

26. We’re getting tricky!  Seawater has a higher concentration of salt than do human body cells. Imagine that poor D’wan is stranded out at sea, and very thirsty. He drinks a bunch of seawater.  What type of solution is seawater (hypertonic, hypotonic, isotonic)?  What will happen to his cells as a result?

27. We’re getting tricky!  Seawater has a lower concentration of water than do human body cells.  What type of solution is seawater (hypertonic, hypotonic, isotonic)?  What would happen to your cells if you drank seawater?

28. We’re getting tricky!  Distilled has a higher concentration of water than do human body cells.  What type of solution is seawater (hypertonic, hypotonic, isotonic)?  What would happen to your cells if you drank distilled water?

29. We’re getting tricky!  Distilled has a lower concentration of minerals than do human body cells.  What type of solution is seawater (hypertonic, hypotonic, isotonic)?  What would happen to your cells if you took a bath in distilled water?

30. Worksheet  Everyone loves… WORKSHEETS!!!

31. Exit Question 1. A cell contains a solution that is 44% water, and it is sitting in a solution that is 70% water. 2. A cell contains a solution that is 64% water, and it is sitting in a solution that is 64% water. 3. A cell contains a solution that is 9% sugar, and it is sitting in a solution that is 88% sugar.  Identify the type of solution  Describe what will move, and where  Explain how the cell’s volume will change  Identify the type of solution  Describe what will move, and where  Explain how the cell’s volume will change