From the cell webquest and the onion and cheek cell labs you've learned a few fundamental differences between plant and animal cells. Both plant and animal cells have a cell membrane, but only the plant cell also has a cell wall. In the elodea lab you can clearly see the structure and function of each. The process you will see is called plasmolysis - you'll do some further reading on it in the lab. Plasmolysis in action!
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Go to this link and click on the diffusion/osmosis basic principal. Read about diffusion and osmosis.
Then click on the plasmolysis animation. Watch the animation carefully. On your video blog post, explain what happened, using the following questions as a guide.
- What happens to the cells as the salt water flows under the cover slip?
- Why does this happen?
- Why didn’t the outer boundary of the cell collapse?
- Why do plants wilt when there is not enough water?
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