Death+by+Design+Notes+Zach

Death by design //Programmed Cell Death (PCD)// Cell PCD
 * Cell Suicide
 * Cancer Cells bypass PCD
 * Continue to divide and make a tumor
 * Leevwenhoek: scientist to use the microscope and find cells...and name them
 * Animal Cells: look more like soap bubble
 * can do everything animals cells can do
 * Community of Cells
 * Different roles in this community of cells
 * Multicellular communities came much much later (during evolution)
 * Cells can communicate wit one another
 * In general cells send signals to one another
 * Cancer cells get signals and don't listen
 * Cells do nothing unless they are signaled to do something
 * Cells need signals from other cells to tell them to stay alive
 * IF cells are divided they die because they know NOT what to do
 * Cells don't actually kills themselves, they have no choice.
 * They start PCD when they are told to die
 * "neat" death
 * destroy evidence (eat the dead cell)
 * webbed feet - destroy web part - kill it
 * PCD of neurons (80z5) in developing
 * Why make a cell if you are going to tell it to die?
 * Probably because that cell had a purpose in an ancestor but not now.