LC-Cancer+Cells+in-class

In our body we have 10^13 cells DNA damage can include radiation, sun, smoke, chemicals Immortal Cell- never dies protection from cancer PCD- programmed cell death 2 genes protooncogene encourage cell division tumor supressors stop cell division these 2 genes damaged in cancer cells These 2 genes are damaged in cancer cells proto-oncogen normally encourages cell division after DNA damage oncogene and cell division goes crapy tumor supressor normally inhibits all division after DNA damage no longer inhibits all division cells that are cancer cells weird cells - ends of DNA telomere never get shorter weird large nucleus multi lobed no function except to divide cancer cells can pile up on each other normal cells stop dividing if they touch another cell so cancer cells make tumors