1. 1 Review What happens during diffusion Explain Describe the process of osmosis Compare and Contrast What is the difference between diffusion and facilitated diffusion 2 Review How is active transport different from passive transport Explain Describe the two major types of active transport

2. Ch 7 Cell Structure and Function
7.3 Cell Transport

3. Concentrations

4. Oil on water
Koolaid in water
Air freshener in a room
Many more examples….

5. Passive Transport Goes from High concentration to Low Concentration
Follows concentration gradient
Simple diffusion
Facilitated diffusion
Does NOT use energy.

6. Diffusion
Movement of molecules from are of high concentration to low concentration.

7. Simple Diffusion

11. Facilitated Diffusion
Molecules use special protein channels to diffuse across the membrane
Does NOT use energy
Aquaporins
Protein Channel for water.

12. Osmosis
Diffusion of water across a membrane.

15. Isotonic Hypotonic Hypertonic Same concentration on both sides
Low concentration
Hypertonic
High concentration.

17. Osmotic Pressure
Force of the net movement of water in or out of a cell.

19. Active Transport Goes from LOW concentration to HIGH concentration
Goes AGAINST the concentration gradient
Requires energy
Why would this be used/where?

20. Molecular Transport

21. Bulk Transport Endocytosis Exocytosis Taking material in Phagocytosis
Food
Pinocytosis
Liquid
Exocytosis
Removal of material