1. Active Transport  Catalyst:

2. Objectives  By the end of the period, SWBAT…  Compare active and passive transport  Identify whether cellular transport is diffusion, active transport, or osmosis

3. Passive Transport  Key Point #1: Passive transport takes no energy and always moves towards equilibrium.  The goal is equal concentrations.  High  Low concentration  Happens easily and naturally (no energy)  BOTH diffusion AND osmosis are passive transport

4. In DIFFUSION  The solutes are permeable to the membrane and move H  L.

5. In OSMOSIS  Only water is permeable to the membrane.

6. Active Transport  Key Point #2: Active transport takes energy to move all solutes in or out of the cell.  The goal is to move against equilibrium  Low  High  Happens on purpose (takes energy)

7. In ACTIVE TRANSPORT  The solutes are permeable to the membrane and move L  H

8. Active Transport  Why would the cell do this?  To store food inside the cell  To eliminate wastes  To get rid of toxins

9. Comparing the Three DIFFUSION ACTIVE TRANSPORT PASSIVE TRANSPORT OSMOSIS SOLUTES WATER EQUILBRIUM NO ENERGY SOLUTESEQUILBRIUM ENERGY

10. Helpful Hints  How can you tell if something is active or passive?  How do you know if it diffusion or osmosis?  Ask yourself:  Is the solute moving, or is water moving?  What is permeable to the membrane?  Are we moving H  L or L  H?

11. Guided Practice  State whether this is Active Transport or Passive Transport

12. Active or Passive?

14.  Water moving to equalize concentrations

15. Active or Passive?  Cell uses energy to get as much sugar as possible

16. Active or Passive?  Happens naturally with no use of energy

17. Active or Passive?  ALL solutes being moved out of the cell

18. Active or Passive?  Takes energy

19. Active or Passive?  Moving toward equilibrium

20. Changing Gears  Now I will give your two cells. I will tell you what is moving and where. You tell me if it is DIFFUSION, OSMOSIS, OR ACTIVE TRANSPORT.

21. If solutes are moving from L  R

23. If water is moving from R  L

24. Water is moving from inside  outside  A cell has a 40% sugar concentration inside is in a solution of 50% sugar concentration  HINT: IT MIGHT HELP YOU TO DRAW THE SITUATION

25. Solutes are moving from inside  outside  A cell has a 10% sugar concentration inside is in a solution of 50% sugar concentration

26. Solutes are moving from outside  inside  A cell has a 10% sugar concentration inside is in a solution of 80% sugar concentration

27. Solutes are moving from outside  inside  A cell has a 40% sugar concentration inside is in a solution of 20% sugar concentration

28. Exit Question