Plasmolysis Follow Up Questions

* What is the function of the central vacuole?

* Why didn't the salt from the outside just move inside the cell instead of the water moving out of the cell? What does this tell you about the cell membrane?

* What structure did the shrinking of the cell allow you to observe?

* Why didn't the cell wall shrink?

* Predict what would happen if we used a 20% salt solution.


(The central vacuole is an organelle in plant cells that stores nutrients and water for the cell. It can take in and release water depending on the cell's needs. Animal cells do not have a central vacuole; they have many small vacuoles, which contain proteins, carbohydrates, water, and nutrients.)

(The cell membrane is selectively permeable. It allows the movement of water but not salt.)

(The cell wall.)

(It is rigid and provides support to the Elodea plant cell. Also, it allows salt to go through so it does not shrink, unlike the cell membrane.)