Web+Quest

=__DIFFUSION & OSMOSIS WEBQUEST__ =  Write your name on a sheet of lined paper and title it DIFFUSION AND OSMOSIS WEBQUEST. Write the answers to the following questions while going through the webquest.

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Scroll down to the animation titled “Membranes are not static sheets of molecules locked rigidly in place”. View the animation. 1. Write a statement that summarizes the structural properties of the cell membrane

Scroll down to the picture of the cell membrane 2. What is the function of the carbohydrates on the membrane’s outer surface? 3. How are the functions of the proteins on the outer and inner sides of the membrane different? 4. List the two general types of proteins found in the cell membrane and their function. a. b.

Part II: Passive Transport
Use the links for the appropriate sets of questions. [] Watch the video segments. (tabs on right side of screen)

5. Draw an outline of a cell. Show internal and external concentrations of water on the inside and outside of the cell that would cause a concentration gradient. 6. Define the term diffusion:

Part III: RED BLOOD CELLS:
Click on the links below [|Isotonic Solution] [|Hypertonic Solution] [|Hypotonic Solution]

7. a. Draw a red blood cell in an isotonic solution. Use 90% water and 10% solute as the concentration inside the cell. Label the external environment of the cell appropriately.

b. Draw a red blood cell in a hypertonic solution. Use 90% water and 10% solute as the

c. Draw a red blood cell in a hypotonic solution. Use 90% water and 10% solute as the concentration inside the cell. Label the external environment of the cell appropriately.

[] Make sure to click on the “green” CLICK HERE prompt to view the videos!! Look at the movie at the above weblink.

8. The organism in the movie is a protozoan called a paramecium. Read the captions along with the movie clips. a. What is the role of the specialized cell structure cilia for this organism?

b. What is the role of the contractile vacuole?

c. Do you believe the paramecium lives in a fresh water or saltwater environment? Explain: (clue – what is the function of the contractile vacuole and which direction (into or out – of) is the water being pumped?) ___