Name : ______
Date: ______
The Cell Membrane : Review #1
Cell Membrane Structure and Function (Learning Outcomes G1-G3)
Read pp. 68- 73
L.O. G – 1 Fluid Mosaic Model
___ 1 Explain why the present theory of cell membrane structure is called the "FLUID
MOSAIC" model?
____2. Describe the difference between an integral protein and a peripheral protein.
___ 3. What is the difference between a glycoprotein and a glycolipid?
___ 4. What is the collective function of all the carbohydrate chains (Glycocalyx) on
the surface of the cell membrane?
___ 5. Use CRERC to describe the 5 major roles of membrane proteins
____6. What role does cholesterol play in the cell membrane?
L.O. G – 2 Selectively Permeable
___ 1. Why is the cell membrane described as being selectively permeable rather than
semi-permeable?
____2. In general methods of transport across the cell membrane can be classified as
being either "Passive" or as being "Active". What is the key difference between
these two categories of transport?
____3. List three specific types of passive transport.
____4. Besides a concentration gradient, what else is required for Facilitated Transport.
____5. Name at least 3 key molecules that can DIFFUSE across the cell membrane. See
Table 4.1 on p.70
L.O. G – 3 Diffusion and Osmosis
___ 1. What does the "Law of Diffusion" state?
___ 2. Would diffusion occur more quickly in liquids or in gases, explain why?
____3. Give the definition for each: a) Solvent b) Solute
___ 4. What is meant by a "concentration gradient"?
___ 5. Many water molecules struggle to pass through the hydrophobic region of the cell membrane, what will allow many of the molecules to slip through? –Think CRERC
___ 6. Define osmosis.
___ 7. How are diffusion and osmosis similar, and how do they differ?
___ 8. Pressure caused by the concentration gradient between two different solutions is
called ______pressure.
___ 9. Name the three types of solutions that cells can be placed into.
OVER --> OVER -->
___10. What will happen to an ANIMAL cell when it is placed into the following:
A) Hypotonic Solution B) Hypertonic Solution
___11. What will happen to an ANIMAL cell when it is placed into the following:
A) Hypotonic Solution B) Hypertonic Solution
PRACTICE QUIZ