Osmosis/diffusion in Elodea Cells 


Materials: Elodea leaves, salt solution, paper towel, and distilled water.

Methods: Prepare a slide using an  Elodea leaf with tap water. 

                Look at in low and high power.

1.  Use the diagram below to add salt solution to the leaf.

                   


     Compare the shape of elodea cells from yesterday with tap water and today with salt water.

2.  Repeat the procedure above but this time use distilled water.

    What happens to the cells when the salt water is flushed out with distilled water?

3.  How does osmosis/diffusion work?  In your answer include the terms cell membrane,

     selective permeability, passive transport, active transport, and ATP. 

      ( These are from Q 7 in booklet)