1. Ins and Outs of Osmosis and Diffusion

2. Frank the Paramecium

3. Meet Frank Frank is a Paramecium
Parameciums are unicellular (one celled organisms)
Paramecium are Protists and are EUKARYOTES

4. Meet Frank They are found in water environments (typically freshwater)
They move using small hair like structures that cover the outside of the cell (part of the cell membrane)

5. The following questions are based on a one-celled organism called a Paramecium swimming in freshwater. Assume the salt in the Paramecium cannot permeate out or into the cell membrane, but the water can.

6. If Frank is about 1% solute concentration inside, where is salt more concentrated (remember he is swimming in freshwater)?
0% salt
1% salt

7. If salt COULD permeate the cell membrane, in which direction would salt move?
HIGH TO LOW!

8. If salt COULD permeate the cell membrane what would the movement of these particles be called?

9. Where is water more concentrated?
0% salt
1% salt
99% h2o

10. In which direction will the water molecules move?
99% h2o
HIGH TO LOW!

11. What is the movement of these water particles called?
99% h2o

12. Will Frank shrink or swell in this environment?
99% h2o

13. What type of solution is Frank swimming in (hypertonic, hypotonic, isotonic)?
99% h2o

14. So long as Frank is in a freshwater solution the water will continue to rush in. What type of transport must Frank perform to keep from bursting and dying?
100% h20
99% h2o

15. If the Paramecium is killed, what is this process called (death of a cell due bursting)
Lysed

17. Franks new fiancé lives in an environment that has a 4% salt concentration. Frank still consists of about 1% salt.

18. If Frank is about 1% solute concentration inside, where is salt more concentrated (remember he is swimming in 4% salt)?
4% salt
1% salt

19. In which direction will water molecules move now?
4% salt
**Remember, if there is a 4% solute then it is 96% water outside. 1%salt= 99% water inside
Water is more concentrated INSIDE, therefore water will rush out (HIGH TO LOW)
1% salt

20. What type of solution is Frank swimming in (hypertonic, hypotonic, isotonic)?
4% salt
1% salt

21. Will Frank shrink or swell in his new environment?
4% salt
1% salt

22. If the Paramecium is killed, what is this process called (death of a cell due to dehydration)
Plasmolysis