Biology 4-2

Stem cells have 3 Characteristics
- Unspecialized
- Can make more stem cells
- Can make specialized cells
- Stem sells renew themselves
- Some genes in both cells
3 Kinds of Stem Cells
- Embryonic stem cells
- Adult Stem Cells
- Induced pluripotent Stem Cells (iPSCs)
- -Reprogrammed adult cells
- -Become like embryonic stem cells
Embryonic Stem Cells
- From very early embryo
- Get them from fertility clinics
- 400,000 frozen embryos sitting in clinics
- Can consent for research
- Are capable of long term self renewal
- Can make millions of stem cells
- Cam become all cell types
- 220 different cells
- If you add different chemicals you can make different things ex-blood, nerve
- Disadvantage at some point you have to use an embryo
Adult Stem Cells
- Are found in some tissues (12 so far)
- Can make the cell type of the same tissue in which they reside
- ex-nerve in a dish get nerve cells
- More specialized then embryonic stem cells

Author

nicolej12

17801

Card Set

Biology 4-2

Description

4-2

Updated

2010-05-04T22:15:45Z

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