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  • 01:51
     
    #normal cell will divide only when it receives a chemical signal telling it to do so   
    A normal cell will divide only when it receives a chemical signal telling it to do so these signals are interpreted in the nucleus and the cells reproduce their genetic information and divide into two identical daughter cells through a process called my mitosis.
  • 02:08
     
    #Cancer cells will divide even if they do not receive appropriate signals   
    Cancer cells will divide even if they do not receive appropriate signals in addition to the signals that normal cells receive telling them to divide they are also told when to stop dividing. This prevents too many cells from being in fact the cell division process is a highly ordered process. This is a critical issue in cancer because cancer cells do not obey or require normal signals for division. This can lead to the formation of a mass of cells that piles up and may form a tumor. Also different from normal cells is the ability of cancer cells to continue dividing indefinitely An important point about cells is that no matter what their job is in the body they all have the same general structure.
  • 04:19
     
    #genes to fail to perform or to do their job    #cancers are thought to result from changes to DNA   
    For example cells in the lungs use different bits of the blueprint to do their job than the cells in our stomach. In cancer changes to the DNA cause some of the genes to fail to perform or to do their job in a way that causes problems for the affected individual In short all cancers are thought to result from changes to DNA that alter critical genes and change the behavior of the affected cells.

Animated Introduction to Cancer Biology (Full Documentary)

An animation/video teaching the basics of how cancer forms and spreads. Topics include: mutation, tumor suppressors, oncogenes, angiogenesis, apoptosis, metastasis and drug resistance. Learn more at the CancerQuest website- http://www.cancerquest.org






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