4.4 Cell Division, Regulation, and Stem Cells

Stem cells are

• undifferentiated or unspecialized cells in the body.

• differentiated or specialized cells in the body.

• only found in the inner mass cells of blastocyst

• only found in a fetus

As cells become more specialized

• cells have access to more genes

• some genes are turned off

• some gene segments get lost

Which has the lowest potency?

• Morula

• Blastocyst

• Fetus

• Adult

_________ refers to a stem cell's ability to differentiate into other cell types

• potency

• potential

• dormancy

• aptitude

Stem cells can be obtained from _________.

• embryos
• bone marrow

• roots and shoots of plants

• all of the above

Stem cells are used to __________.

• make clones
• create new species of animals
• make babies
• grow different types of tissues

Which of the following cells is UNdifferentiated or UNspecialized?

• cardiac muscle cell
• nerve cell
• liver cell
• stem cell

What is the difference between embryonic stem cells and adult stem cells?

• Embryonic can differentiate into more cell types than adult
• Adult only turn into blood, while embryonic turn into many things.
• Adult can differentiate into more cell types than embryonic
• Adult grow bigger than embryonic

Which is true about embryonic stem cells?

• They no longer divide; their cell type is set and cannot change.
• They can develop into only one type of cell.
• They can become any cell type in the body.
• They are found in adults.

What does "pluripotent" mean?

• able to divide and make all different types of cells
• not able to divide
• can only divide and make one cell type 
• if it divides, it will make a cancerous tumor