1. 2. Facilitated Diffusion
PASSIVE TRANSPORT
3 Types
1. Diffusion
2. Facilitated Diffusion
3. Osmosis

2. 1. Diffusion molecules from a high concentration to low concentration
Molecules want to reach equilibrium
No ATP required
Diffusion Video

3. What kind of particles diffuse through the Plasma Membrane?
Oxygen, glucose, and carbon dioxide diffuse through the membrane

4. 3 Factors that effect the rate of Diffusion
1. Concentration
2.Temperature
3. Pressure
Makes diffusion happen faster

5. If we had heated up this water, would the food coloring have diffused faster?

6. Concentration Gradient
The difference in concentration is the concentration gradient

7. 2. Facilitated Diffusion
Still goes from HIGH to LOW
“helps” a molecule go through the membrane
EX: Transport Protein
EX: Making coffee
Facilitated Diffusion

9. Comparing the 2 Types of Diffusion

10. STOP

11. Osmosis The diffusion of WATER across a semi- permeable membrane
high concentration to a low concentration of water

12. Osmosis To be different from diffusion, Osmosis needs 2 things:
1) Water
2) Semi-permeable Membrane
THE MOVEMENT OF WATER

13. Hint: the sugar isn’t moving across
What happened?
Hint: the sugar isn’t moving across

14. Osmosis
There is a higher concentration of “DOTS” on one side, so a LOWER concentration of WATER The DOTS equal a solute

15. 3 kinds of Osmotic Solutions
1) Isotonic
2) Hypertonic
3) Hypotonic

16. Isotonic Equal amount of water inside and outside the cell
EX: Saline solution for contact lenses

17. Hypertonic
Greater concentration of water inside the cell than outside the cell
Water leaves the cell to reach equilibrium
EX: When your fingers get wrinkled in the shower

18. HypOtonic Greater concentration outside the cell, than inside the cell
Water moves into the cell

20. http://highered. mcgraw-hill