2.1.6 Stem Cells

Question 1

Stem cell

Answer 1

Undifferentiated egg cell; renewing source of undifferentiated cells

Question 2

Zygote is…

Answer 2

A stem cell as it can express all of the genes in its genome and is able to divide by mitosis

Question 3

Pluripotent stem cells?

Answer 3

Embryonic stem cells that can differentiate into any foetal / adult cells, but not extra-embryonic structures

Question 4

Totipotent stem cells?

Answer 4

Can turn into any type of cell within an organism; also extra-embryonic tissue (placenta)

Question 5

Multi potent stem cells?

Answer 5

Can only differentiate into certain cell types and are used for growth, replacement and repair

Question 6

Hematopoietic stem cells?

Answer 6

Differentiate into blood cells

Question 7

Brain and nerve tissue cannot be…

Answer 7

Differentiated into

Question 8

Uses of stem cells?

Answer 8

Research in developmental biology; replacement of damaged tissues such as heart muscle;treatment of disease, eg diabetes; stem cells collected from a person will not be rejected by the immune system

Question 9

Developmental biology?

Answer 9

The development of foetuses

Question 10

Sources of stem cells?

Answer 10

Bone marrow or discarded embryos from fertility treatments

Question 11

Ethical issues of stem cells?

Answer 11

Some people do not agree with using embryonic stem cells