1. Solute vs. Solvent Solute: The substance being dissolved
Solvent: a liquid capable of dissolving another substance (Water is the universal solvent)

2. Permeable vs. Impermeable
Permeable – can pass through a substance
Impermeable – cannot pass through a substance
Semipermeable?

3. DEMO

4. Diffusion
Movement of molecules from an area of high concentration to an area of lower concentration
Example: skunk, perfume, night after a dinner at taco bell!

5. Diffusion In Action
When molecules of a substance are in equal concentrations on both sides of a membrane, the molecules are said to have reached dynamic equilibrium.

6. DEMO (Perfume) What molecules moved?
What direction did the molecules move?
Location of molecules in the end?

7. DEMO (Strainer) What molecules moved?
What direction did the molecules move?
Location of molecules in the end?

8. DEMO (Food coloring) What molecules moved?
What direction did the molecules move?
Location of molecules in the end?
How did heat effect the movement of the molecules?
How did cold effect the movement of the molecules?

9. Factors that affect Diffusion
Temperature
Size of Particles
Concentration of Particles (number of molecules of a substance in a given volume )

10. Osmosis
The diffusion of Water!

11. Why is this important for cells?
                                                                      
Capillary

12. Plasmolysis

13. Types of Solutions
Hypertonic Solution = higher concentration of water in the cell than outside the cell
Hypotonic Solution = higher concentration of water outside the cell than inside the cell
Isotonic Solution = equal concentrations of water inside and outside the cell

14. Osmosis In Blood Cells
Lysis
Crenation

15. Osmosis In Plant Cells
Plasmolysis
Turgor Pressure

16. Passive Transport Diffusion and Osmosis
Molecules that are small but too large to pass through the membrane on its own need help from transport proteins.

17. Active Transport Requires energy
Moves molecules against their concentration gradient (from low concentration to high concentration).

18. Endocytosis
Process by which a cell surrounds and takes in material from the environment.
Pinocytosis
Cell “drinking”
Phagocytosis
Cell “eating”

19. Exocytosis The expulsion or excretion of materials from the cell.

20. Exocytosis
Inside of the cell
Outside of the cell

21. Endocytosis and Exocytosis

22. How Cells Eat & Drink