Today in Biology, we took notes while Mr. Paek lectured and reviewed for the test that we will be having on wednesday. The test on Wednesday will be covering all of unit 3- which is the cell theory and cancer.
Osmosis- high concentration to low water moves through a selectively permeable membrane to balance out the concentration.
Diffusion- particles going from a high concentration to a low concentration until they reach equilibrium
- Cells have contact inhibition, they will continue growing until they come into contact with other cells
Cancer
- uncontrolled growth of cells
-changes in DNA can lead to unrestrained cell reproduction
-cells produce a growth and never stop dividing
OR
--cells do not produce a suppressor protein and it never stops dividing
Shape of cells Anchorage Dependent Contact Dependent
Normal Flattened Yes Yes
Cell monolayer
Cancer Rounded No No
Cell globular
Tumors- 2 types
1)Benign - slow growing, noninvasive, no metastatic (jumping around the body)
2)Malignant - rapid growth invasive, metastatic
At the end of class Mr. Peak handed out a review sheet that will be due on wednesday. You can
also do the unit 3 cell theory objectives that are on the first page of the unit packet to study and to get extra credit. And make sure to remember that we meet in the Lyceum tomorrow because we are having a bio day.
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