Extended answer for cellular differentiation

Question 1

Differentiation of stem cells points #1 - #3

Answer 1

1. Stem cells are unspecialised cells (in animals)
2. Stem cells can divide
3. They can differentiate into specialised cells.

Question 2

Differentiation of stem cells #4 - #6

Answer 2

4. There are adult and embryonic stem cells.
5. Embryonic cells differentiate into all cells types
6. Tissue/ adult stem cells differentiate into cells which need to be replaced.

Question 3

Differentiation of stem cells #7 - #10

Answer 3

7. Adult stem cells give rise to more limited cell type
8. following differentiate a cell only expresses certain genes
9. that produce proteins characteristic to that cell type.
10. Example of stem cell source - bone marrow.

Question 4

Research into stem cells and their therapeutic value #1 - #3

Answer 4

1. Stem cell research provides information on cell processes
2. Example of cell processes I.e cell growth
3. Therapeutic use includes repair of damaged/diseased organs or tissues.

Question 5

Research into stem cells and their therapeutic value #4 and #5

Answer 5

4. Stem cell research must be regulated.

5. Example of ethical issue related to stem cell research I.e embryos could develop into humans