STUDY GUIDE: TRANSPORT THROUGH THE CELL MEMBRANE
To prepare for the test:
1. Review all lab work – What was the purpose of each lab? What were the
conclusions?
a. Diffusion demonstration: Iodine, starch and dialysis tubing
b. Osmosis Lab: Variable concentrations of sucrose solution in water
2. Review all notes and worksheets
3. Differentiate between diffusion, osmosis, facilitated diffusion and active
transport.
4. Apply concepts of diffusion, osmosis, facilitated diffusion and active transport.
Apply the terms: hypertonic, hypotonic, isotonic, osmotic pressure, plasmolysis,
dynamic equilibrium, solute, solvent, and solution.
5. Be familiar with the concepts covered in the articles read in class:
a. Transport across the placenta
b. Transport in the human body
c.
Transport and alcohol
6. Answer the questions below:
Diffusion –Solute moves from an area of high concentration to an area of low concentration until
equilibrium in reached. What will the solution look like in equilibrium?
Osmosis: Which side in the diagram below represents what occurred to the dialysis tubes in our
Osmosis Lab? What do the small particles below represent?
Kinigstein –Biology
Facilitated diffusion – How is facilitated diffusion different from “regular” diffusion?
Which type of particles use facilitated diffusion to cross the cell membrane?
Active transport -
In what way is active transport different from diffusion and facilitated
diffusion? Why is energy necessary for this process?
Kinigstein –Biology