2. Mitosis & Cancer: When Making New Cells Goes Terribly Wrong!

3.  When you have to add or replace cells  growth & development  repair  replacement When is mitosis a good thing?

4.  When cells reproduce & they are not needed  these cells take over organs, but don’t do the right job  they just keep making copies  cancer  damages organs When is mitosis a BAD thing

5.  If DNA gets damaged, cells stop listening to correct instructions  mutations  Causes of mutations: Why would cells just make copies?  UV radiation  chemical exposure  radiation exposure  heat  cigarette smoke  pollution  age  genetics

6.  Benign tumor  abnormal cells remain at original site as a lump  most do not cause serious problems & can be removed by surgery Tumors

7.  Malignant tumor  cells leave original site  carried by blood system to other tissues  start more tumors  damage functions of organs throughout body Tumors

8.  Treatments kill rapidly dividing cells  chemotherapy  poisonous drugs that kill rapidly dividing cells  radiation  high energy beam kills rapidly dividing cells Treatments for cancers side effects

9. 2009-2010 Any Questions??