3. STEM CELLS

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    • What are stem cells?

      Cells that differenciate to become specialised cells
    • Undifferenciated cells are ...
      stem cells
    • Stem cells can divide by mitosis to ...
      become new cells on the instruction they're given which then differenciate
    • Where are stem cells found in?

      Early human embryos
    • Early human embryos have the potential to...
      to divide and produce any kind of cell at all
    • Where do all different types of cell found in a human come from in their development?
      Early embryos
    • What are stem cells important for>

      Growth and development of organisms
    • Adults have stem cells, but only found in ...
      certain places, like bone marrow
    • In adults, what are stem cells used for?
      To replace damaged cells, to make new skin or blood cells
    • What are the 3 problems with using stem cells?
      Rejection, tumour development, and disease transmission
    • What are the problems with rejection of the stem cells?

      Patient's body may recognise the cells as a foreign object and trigger an immune response to try get rid of them.
    • What can a patient do with the rejection of stem cells?

      Take drugs to suppress this response, but this makes them more susceptible to disease.
    • What are the problems with tumour development?

      If scientists are unable to control the rate of the cell division in the patient, a tumour may develop.
    • What are the problems with disease transmission?
      Viruses live inside cells and if donor stem cells are infected, it could be passed on and the recipient could get sicker.
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