Death+by+Design-Emma


 * Death by Design**

1. Cells are supposed to kill Themselves once they have run their course, Cancer cells do not do this -Cancer Cells bypass Programmed Cell Death

2. Cells are the unit of life -Leeuwenhock was the first to see cells using a microscope - plant cells look like squares between them - animal cells look like soap bubbles - cells can do everything an animal can do; they also form communities -there are different roles in this community of cells -multicellular communities came much later than the original unicellular organsims

3. how do cells talk to eachother -send a signal to eachother... cancer cells dont listen to these signals - cells dont do anything unless they are signaled to do it                       - move, grow, divide! or dont divide! 4. Cell Death - for cells to stay alive they need signals from other cells to tell them to stay alive or else they kill themselves -put one cell in a dish- it kills itself -PCD requires the cell to make molecules to kill itself, -cells start PCD when "told" told...CANCER CELLS DONT LISTEN -coordinated set of events that kills the cell in a nat way.. boils then shrinks and condenses -kill-->engulf-->destroy - * have to get rid of a lot of cells in order for a proper animal to be created--> ex: fingers, toes and frogs -PCD of neurons (80%) in developing fetus 5. Humans= 10^13 cells worm 959 cells

6. Why make a cell if you are going to kill it? -cells are based on evolution... humans evolved from creatures that were very different from us, we were modified from what has come before -cant go back to the beginning and think of a more effecient process