JH+class+notes+1


 * 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