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Regulating Cells


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Regulating Cells

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