Biology B3.1 - Stem cell research and treatments

Stem cells have no Hayflick limit; sources are embryo, umbilical blood, bone marrow and small numbers in all other tissues. Stem cells are pluripotent – can become most kind of cell.

In Parkinson’s disease the cells in the brain stop making enough dopamine neurotransmitter. Movements become jerky and uncoordinated.

To treat this, stem cells could be removed, grown to increase their numbers,…