Name: ______Date ______Hr. _____

Cell Membrane and Transport Webquest

Part 1

http://www.wisc-online.com/objects/index_tj.asp?objid=AP1101

  1. Why does the cell membrane have transport proteins?
  1. Draw a diagram of the phospholipid bilayer and explain what it means.
  1. What types of proteins are in the membrane? What are their functions?
  1. Why is cholesterol in the membrane?

Answer the questions on the website.

Part 2 Solutions: http://www.chem4kids.com/files/matter_solution.html
1. What is a solution?


2. Explain the difference between the solute and solvent.

3. Explain how solutions are related to the cell.

Part 3 Diffusion and Osmosis: http://www.mun.ca/biology/Osmosis_Diffusion/tutor2.html
1. Read the overview and define all the terms

Diffusion & Osmosis –


Passive Transport –


Concentration Gradients -

Biological Membranes -

Hypotonic-

Hypertonic-

Isotonic-

Scroll down to example #1 (how perfume spreads throughout a room) and read it.
Next scroll down to example #2 (salt dissolving in water) and read it.


Next scroll down to example #3 (diffusion will occur through a permeable membrane)
2. What is the solute concentration in side A?______

What is the solvent concentration in side A? ______


3. What is the solute concentration in side B? ______
What is the solvent concentration in side B? ______


4. On the back of this paper, draw a diagram of the two sides (A and B) and show the movement of solute and solvent across the permeable membrane. Label the concentrations of solute and solvent under both sides.

Part 4 Osmosis: http://biologyjunction.com/tonicity%20animations.htm


1. Look at the first diagram.

What type of solution is the cell in (hypertonic, hypotonic, or isotonic)?______

Use the definitions you wrote in Part 3 to answer this!

(Run the animation)

Which way does the water move? ______

What happens to the cell? ______

2. Look at the second diagram.

What type of solution is the cell in (hypertonic, hypotonic, or isotonic)? ______

(Run the animation)

Which way does the water move? ______

What happens to the cell? ______

3. Look at the third diagram.

What type of solution is the cell in (hypertonic, hypotonic, or isotonic)?______

(Run the animation)

Which way does the water move? ______

What happens to the cell? ______

Part 5Phagocytosis: http://www.stolaf.edu/people/giannini/flashanimat/cellstructures/phagocitosis.swf


Run the animation of phagocytosis.
1. Phagocytosis involves bringing a large particle into the cell. Rerun the animation and describe the process? Draw a diagram to help with your explanation.

2. Do you think this activity would require energy?

3. Where does the cell obtain energy?


4. What organelle do you think digests the incoming particle?

5. What is inside this organelle?

Part 6 Endomembrane

http://www.stolaf.edu/people/giannini/flashanimat/cellstructures/endomembrane%20protein%20synthesis.swf

Run the animation and EXPLAIN in FULL SENTENCES what is happening in the animation. You may need to watch it several times. Use your notes and the information you know about the cell to explain the animation using vocabulary from class. Include the various organelles involved by name and explain the process below:

4