Stem Cells - Stem cell worksheet questions and answers
Coordinated Sciences (Cambridge College)
Stem Cells - Stem cell worksheet questions and answers
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Stem Cells
1. What is the difference between a stem cell and a differentiated cell?
A stem cell has multiple uses...
Stem Cells - Stem cell worksheet questions
and answers
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Stem Cells
1. What is the difference between a stem cell and a differentiated cell?
A stem cell has multiple uses and can become multiple other cells but a differentiated cell
has a limited use and can only produce certain types of cells.
2. Where are somatic cells located?
They are located in the outer-layer. E.g. skin
Isolating ES Cells
1. What day of embryonic development does a scientist take out the cells to
be grown?
5 th to 7th day
2. Name some types of cells that can be grown from these cells.
Neural cells, skeletal muscle cells.
Embryonic stem cells
1. What can be done with stem cells?
Stem cells can be transplanted from donor to patient and, ES cells in particular, can treat
many diseases.
2. What are the considerations about stem cells written in the article?
Without drugs that suppress the immune system, a patient's immune system will recognize
transplanted cells as foreign and attack them.
3. What are the ethical considerations?
When scientists isolate human ES cells, they destroy an embryo. The ethical and legal
, allegations of this have made support research of ES cells more reluctant.
Somatic (adult) stem cells.
1. Where are somatic stem cells found in the body?
Teeth, blood vessels, brain, heart, skeletal muscles, liver, bone marrow, gut, peripheral
blood.
2. Why are they called adult stem cells?
They are called adult stem cells because they exist in matured tissues.
3. How can they be used in therapy?
Stem cells from the blood and bone marrow can be used in treatment for blood-related
diseases.
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4. What are the special considerations that are discussed in the article?
Most types of somatic stem cells are present in low abundance and are difficult to isolate
and grow. Isolation of some types could cause considerable tissue or organ damage for
example in the heart or brain. Somatic stem cells can be transplanted from donor to patient,
but without drugs that suppress the immune system, a patient's immune system will
recognize transplanted cells as foreign and attack them.
5. Are there any ethical considerations?
Therapy involving somatic stem cells is not controversial; however, it is subject to the same
ethical considerations that apply to all medical procedures.
IPS cells (induced pluripotent cells)
1. What are iPS cells?
IPS cells are Induced pluripotent stem cells which are created artificially in the lab by
"reprogramming" a patient's own cells. iPS cells can be made from readily available cells
including fat, skin, and fibroblasts (cells that produce connective tissue).
2. Why is this considered a better type of therapy?
Since iPS cells can be made from a patient's own cells, there is no danger that their immune
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