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Regulating Cells
 

Regulating Cells

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    Regulating Cells Regulating Cells Presentation Transcript

    • Regulating the Cell Cycle Controlling Cell Division Page 250; 10-3
    •  
    •  
      • Apoptosis – programmed cell death
    • Cancer is a cell division disorder
      • Cancer often works like this…
      • Some DNA becomes mutated  this leads to the ‘command’ that stimulates cells to divide even though they are supposed to wait…
      • [growth promoting proteins get ‘over-made’]
      • Genes that inhibit cell division are called tumor suppressors. (these are good)
      • Mutations can ‘inactivate’ these genes and the cell cycle “brake” is removed. Control proteins become inactivated. (this is bad)
      • There is nothing to stop the cell from rapid and out of control division. MANY CANCER CELLS HAVE MUTATIONS IN THEIR TUMOR-SUPRESSOR GENES.
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    • Page 252
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