B2 Stem Cells

HideShow resource information
  • Created by: Sara
  • Created on: 03-01-13 13:58
Preview of B2 Stem Cells

First 271 words of the document:

Stem Cells
All the cells in your body have differentiated to become specialised to a specific job. Animal cells lose
their ability to differentiate at a very early stage, however most plant cells can differentiate through
most of their lives. Stem cells are undifferentiated cells; they haven't yet got their job.
Stem cells are found in embryos and in bone marrow. Stem cells in human bone marrow can't
differentiate into ANY type of cell, only some types. However, embryonic stem cells have the ability
to change into any type of cell.
They can turn into red blood cells, white blood cells, muscle cells, nerve cells; just about any cell in
the body. That's why medical researchers have taken such a huge interest in them.
They can be used to cure diseases. For example, if an individual was suffering from a spinal injury
causing him to be paralysed, scientists could use embryonic stem cells to produce nerve cells which
could then help the person suffering. Stem cells can also help cure other diseases: Parkinson's
disease, Type 1 diabetes and they can be used to make new organs.
Stem cells divide by mitosis
The embryonic stem cells that scientists want to use come from IVF. When a couple are trying for a
baby and several gametes are fertilised, only a few of them are implanted into the woman (one or
two). The rest would be discarded. Scientists want to use the cells which would have been discarded
for stem cell research.

Other pages in this set

Page 2

Preview of page 2

Here's a taster:

Curing patients who already exist and suffer every single day is more important than the
rights of an embryo
Embryos used for stem cells would be unwanted ones from IVF which would be destroyed
anyways, so they should be used for research instead
Using embryonic stem cells for research would be killing a potential human life
People should be helped using other sources, not other humans…read more



this has been very useful

Similar Biology resources:

See all Biology resources »See all resources »