Name
Lesson 2.4
Osmosis and Diffusion Review
Date
Period
Key Terms
Permeability
Osmosis
1. Read your assigned article.
2. Record notes from the article assigned to you. (Don’t copy everything! Only pick out the major concepts because you need to share
these notes with your group members.)
3. Present the information from the article located at your table using your notes. Verbally share, don’t just have your group members
copy.
4. Record notes from the presentations offered by the other members of your group.
5. Respond to the questions following the provided notes section.
Article 1 Notes (Hint: Pre-read questions 1-3)
Article 2 Notes (Hint: Pre-read questions 4-8)
Article 3 Notes (Hint: Pre-read questions 9-11)
Article 4 Notes (Hint: Pre-read questions 12-17)
Review Questions
1. What is the process of diffusion?
2. How does the difference in concentration affect the rate of diffusion?
3. How does the temperature affect the rate of diffusion?
4. What is a membrane?
5. What does the word impermeable mean?
6. What does the word permeable mean?
7. What does the word semi-permeable mean?
8. If a membrane allows water to pass through it, but does not allow starch to pass through it...
a) Is it impermeable, permeable or semi-permeable?
b) What is it impermeable to?
c) What is it permeable to?
9. What is the diffusion of water through a semi-permeable membrane?
10. If two containers are separated by a membrane that is permeable to water and not to starch, and one of the containers holds pure
water while the other contains a concentrated starch solution, in which direction will osmosis transfer water?
11. Give an example of osmosis in a living organism.
12. What is an isotonic solution?
13. What is a hypertonic solution?
14. What is a hypotonic solution?
15. If a blood cell is placed into an isotonic solution, what do you predict will happen to the cell?
16. If a blood cell is placed into a hypertonic solution, what do you predict will happen to the cell?
17. If a blood cell is placed into a hypotonic solution, what do you predict will happen to the cell?
18. What is the process of moving a material from high
concentration to low concentration?
a) Osmosis
b) Isotonic Solution
c) Semi-permeable membrane
d) Diffusion
19. What is the diffusion of water molecules across a semipermeable membrane?
a) Isotonic Solution
b) Cytoplasm
c) Impermeable Membrane
d) Osmosis
20. What is a barrier that separates a cell from the external
environment?
a) Cytoplasm
b) Cell Membrane
c) Solution
d) Impermeable Membrane
21. The level of the solution on the left side of the membrane will …
a) remain the same
b) drop
c) rise
d) drop then rise
Use the diagram to the right to answer questions 22-24.
22. The membrane is
to water molecules.
a) permeable
c) impermeable
b) diffusion
d) osmosis
23. The membrane is
a) permeable
b) diffusion
24. This is a
a) permeable
b) diffusion
to large molecules.
c) impermeable
d) osmosis
membrane.
c) impermeable
d) semi-permeable
25. The ability of a living organism to maintain a steady state of internal conditions is…
a) ecology
c) evolution
e) continuity
b) homeostasis
d) growth and development
26. Turn the page over to answer the last question.
In the space below, construct a concept map with your group members. You must use the terms listed below but you are not limited
only to these terms. You must use sentences or definitions to justify your placement of these concepts.
diffusion
permeable
cytoplasm
isotonic
osmosis
impermeable
solution
hypertonic
membrane
semi-permeable
cell membrane
hypotonic