SB2d Stem Cells

Question 1

Adults stem cells key info?

Answer 1

.only contain a few stem cells, such as those found in bone marrow
.can only differentiate into one of a few different cell types

Question 2

Embryonic stem cells key info?

Answer 2

cells of an early embryo are able to develop into any type of specialised (differentiated) cell. Cells loose this ability as they mature.

Question 3

Differentiate?

Answer 3

to become different or specialised (become different kind of cell).

Question 4

Stem cell?

Answer 4

a kind of cell that can produce other kinds of cell through division.

Question 5

Name different kinds of differentiated cells in the body (4)

Answer 5

.heart cell
.bone cell
.nerve cell
.blood cell

Question 6

What are two sources of stem cells?

Answer 6

early embryo and adult stem cells from differentiated tissue.

Question 7

Benefits of using embryonic stem cells to treat human disorders (2)

Answer 7

.Easier to remove from tissue
.Can produce a wide range of specialised cells to replace damaged tissue

Question 8

Drawbacks of using embryonic stem cells to treat human disorders (1)

Answer 8

.Ethical issues with destroying embryo to get stem cells

Question 9

Risks of using embryonic stem cells to treat human disorders (2)

Answer 9

.Differentiated cells may be rejected when used in treatment
.Cells can keep dividing and cause cancer

Question 10

Describe the role of meristems in plant growth.

Answer 10

meristems contain stem cells that can produce any type of specialized cell throughout the life of the plant.