Plasmolyzed Cell Lab!

Agenda:

1. QUIZ!

2. Bring up 34-35 with stamp sheet

3. Discuss diffusion lab and osmosis in cells

4. Discuss pH enzymes and tomarows lab

5. Plasmolyzed lab (UP 36-37)

Homework:

1. Finish Plasmolysis lab (UP 36-37)

2. Prelab for enzyme lab:

a. Use section 2.4 in textbook for extra help

b. Lab on UP 24-30

When we first got to class we took the quiz. After that we got our stamp for the diffusion lab. Next, as a class we discussed the diffusion lab and answered any questions we had. Mrs. Stein then explained how osmosis in cells works. She explained that a cell might have 99% water and 1% salt in it, while its in a puddle of 6% salt and 94% water. If this happened then the cell would get rid of all the water in it because it moves from high concentration to lower concentration. When this happens, the cell membrane gets smaller and squeezes all the chloroplast into the middle of the cell. Then we witnessed this for ourselves by doing the Normal and Plasmolyzed Cell lab. We ended the class by working on the Analysis questions. If you dont understand this read page 211 in the textbook.

Plasmolyzed Elodea Plant Cell (in salt water):

Elodea Cell (in tap water):

The next scribe will be: Gabby