Stem Cells

Stem cells are

• cells that grow uncontrollably
• undifferentiated and can be any type of cell
• cells that show symmetric division

• only found in embryos

​ ​ (a)   of different cell types involves progressive restrictions in their developmental potentials.

• Determination
• Differentiation
• Potency

What does 'potency' refer to in the context of stem cells?

• The toxicity of a cell

• The ability of a cell to migrate

• The range of cell types a cell can become

• The ability of the cell to divide

Which has the highest potency?

• Morula

• Blastocyst

• Fetus

• Adult

Which of the following is true about totipotent cells?

• They can only become skin or nerve cells

• They can form all cell types including extraembryonic tissues

• They are only found in adult tissues

• They only form blood cells

Identify the structure that gives rise to pluripotent cells in the blastocyst.

Select the correct stem cell type that can only form one cell type.

• Totipotent

• Pluripotent

• Multipotent

• Unipotent

Match the stem cell type to its example.

• Zygote

• Totipotent

• Hematopoietic stem cell

• Pluripotent

• Embryonic stem cells

• Unipotent

• Spermatogonial stem cell

• Multipotent

Which ethical concern is associated with embryonic stem cell research?

• Immune rejection

• Cost of therapy

• Moral status of the embryo

• Storage issues

Stem cells from _______ are used in bone marrow transplantation.

• Hair follicles

• Blood

• Spleen

• Liver