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Activity 2Comprehension

1.

What is new about these stem cells?

2.

Name four types of tissue in the body that have been made from these stem cells.

3.

What do the scientist hope to use these new stem cells for?

4.

The scientists knew that amniotic fluid contained cells that could grow into which types of tissue?

5.

What fraction of the cells in amniotic fluid are AFS cells?

6.

Scientists knew already about stem cells in the embryo, and about stem cells in an adult. So where do these new cells fit in?

7.

What is the purpose of amniocentesis?

8.

In obtaining amniotic fluid doctors take more than they need. Why?

9.

Can you think what would normally happen to this backup fluid?

10.

Stem cells might be used in the future to grow new organs, like hearts and spleens, for transplants. How many different stem cell specimens would be needed to supply almost all of the people in the USA with transplants?

11.

Do you know why transplants have to be a “perfect genetic match”?

12.

Long before stem cells are used to make whole organs, they will be used to replace damaged or diseased cells in existing organs. Would these need to be a perfect genetic match also?

13.

Adult stem cells are very hard to obtain, because there are so few of them in a human body. Embryonic stem cells can be gathered much more easily for research and use in medicine, but the embryo dies. So a lot of people disapprove of this. What is the big advantage of this new source of stem cells?

real   science

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