THE CELL MEMBRANE
Cut out the diagram of a
phospholipids membrane of a cell,
and tape or glue it into your journal.
Answer the following questions in
complete sentences below it.
1. What is a phospholipid?
2. What elements are in a phosphate
group? (Refer to the diagram of
the phospholipids in your notes).
3. What is a lipid?
4. What other type of molecule is present in the plasma membrane?
5. What are the 2 functions of the plasma membrane?
6. Would it be possible for polar molecules or ions to move through the phospholipids bilayer? Why or why
not?
7. Define “Hydrophilic.” What part of the phospholipid is hydrophilic?
8. Define “Hydrophobic.” What part of the phospholipids is hydrophobic?
9. Is the area in between the bilayer polar or non polar?
10. Describe what is meant by the “fluid” part of the fluid mosaic model.
11. Describe what is meant by the “mosaic” part of the fluid mosaic model.
12. What is the role of a receptor protein?
13. What relationship does a hormone have with a receptor protein?
14. What is the role of a marker protein?
15. Why do marker proteins create a challenge in organ transplants?
16. Channel proteins let which kinds of molecules through the cell membrane? Why wouldn’t these molecules
be able to get through otherwise?
17. What type of membranes do cells have? (refer to the end of your notes for examples)