stem cells

Cards (12)

  • describe stem cells
    undifferentiated cells that divide by mitosis to produce more undifferentiated cells and differentiate into different types of cells
  • give types of animal stem cells
    embryonic and adult
  • describe embryonic stem cells
    come from early human embryo to differentiate into most types of cells
  • describe adult stem cells
    come from adult bone marrow and differentiate into certain types of cells (blood cells)
  • give conditions treated by stem cells
    diabetes and paralysis
  • give two medical uses of stem cells
    faulty cell replacement and therapeutic cloning
  • describe process of faulty cell replacement
    1. extract embryonic stem cells
    2. stimulate differentiation
    3. replace faulty cells with specialised cell
  • describe process of therapeutic cloning
    1. embryo produced with same genetic material as patient
    2. embryonic stem cells transplanted to patient
    3. embryonic stem cells differentiate inside patient
  • give disadvantages of stem cell treatment
    limited supply of embryonic stem cells, risk of infection, risk of rejection and ethical objections
  • give type of plant stem cell
    meristem
  • describe meristem stem cell
    found in growing roots and shoots to differentiate into any type of plant cell
  • give uses of meristem stem cells
    produce clones of desired plants for particular characteristic or prevent extinction