4.1.2.3 stem cells

Question 1

What are embryonic stem cells?

Answer 1

These are cells that are in an early stage embryo which can turn into anything.

Question 2

What is a stem cell?

Answer 2

An undifferentiated cell which can give rise to more cells of the same type or differentiate into other cell types.

Question 3

What are the three type of stem cells found In human bone marrow?

Answer 3

Platelets
Red blood cells
White blood cells

Question 4

How can leukaemia be treated with bone marrow?

Answer 4

Radiation is done to destroy infected bone marrow.
The patient receives a bone marrow transport from a donor.
The stem cells divide and form new bone marrow. They also differentiate and form blood cells.

Question 5

What are the two main problems with bone marrow transplanting

Answer 5

The donor must be compatible
The patient may be at risk from passed on viruses in the donors bone marrow

Question 6

What is therapeutic cloning?

Answer 6

An embryo is produced with the same genes as the patient . Stem cells can be transplanted without being rejected and once inside they can differentiate to replace non working cells.

Question 7

What are plant stem cells?

Answer 7

Roots and buds contain meristem tissue, the stem cells can become anything throughout a plants lifespan.

Question 8

What are examples of plant cloning and why may we do this?

Answer 8

We could clone a rare plant from stop it from going extinct.
We could produce more crops for farmers