Date ______
Cell Membrane Web Activity
Name ___________________
Use the website below to view the slides and answer the following questions:
http://www.wisc-online.com/objects/ViewObject.aspx?ID=ap1101
_____________
___________________________________________________________
1. What substances can pass through the cell membrane? Give examples (slide 5).
___________
___________________________________________________________
2. What substances cannot pass through the cell membrane? Give examples (slide 5).
_______________
___________________________________________________________
3. How are water molecules able to pass through the cell membrane? (Slide 8)
______________________________
___________________________________________________________
4. How ions transported through the cell membrane?
_____________________
___________________________________________________________
___________________________________________________________
5. Explain the structure and function of the glycoproteins. (Slide 10)
6. What are the 2 main functions of the cholesterol molecules in a cell membrane? What type of cell lacks
_________________________________
___________________________________________________________
___________________________________________________________
cholesterol in the cell membrane? (Slide 11)
Date ______
Cell Membrane Web Activity
Name ___________________
7. Label the parts of the cell membrane below (Slide 13)
8. Which part of the cell membrane forms the basic frame? (Slide 14) _______________________________
9. Label the hydrophilic and the hydrophobic regions of
the phospholipid bilayer (Slide 15 and 16)
Use the following website to view the animation and answer the questions (HINT: You can pause the
animation by right-clicking on the animation and un-checking “play”)
http://programs.northlandcollege.edu/biology/Biology1111/animations/transport1.html
Click on Passive Transport in the menu.
___________________________________________
___________________________________________________________
10. What is “active transport?”
________________________________
___________________________________________________________
11. What are the three types of passive transport?
Click on “Simple” in the bottom menu
____________________________________________
___________________________________________________________
12. Define the term diffusion:
____________________________________
___________________________________________________________
13. Define the term concentration gradient:
Cell Membrane Web Activity
Name ___________________
14. List four factors that affect the rate of diffusion ________________________________
___________________________________________________________
Date ______
Choose “Facilitated” from the bottom menu.
_________________________
___________________________________________________________
___________________________________________________________
15. How is facilitated diffusion different than simple diffusion?
16. How is facilitated diffusion similar to simple diffusion? ____________________________
___________________________________________________________
17. Explain how the proteins help transport substances across the cell membrane. _______________
___________________________________________________________
___________________________________________________________