Cell Differentiation and Stem Cells: P1

Stem cells are

• cells that grow uncontrollably

• undifferentiated and can be any type of cell

• never go through cell division

• only found in embryos

What process best explains how muscle cells and nerve cells can develop from the same fertilized egg?

• genetic engineering

• survival of the fittest

• differentiation

• selective breeding

Which best explains why heart cells are different from blood cells?

• Heart cells are produced by the brain, but blood cells are produced by the heart.

• Different genes are activated in heart cells than in blood cells.

• Heart cells experience different environmental influences than blood cells.

• A mutation occurs during the development of heart cells but not in blood cells.

This type of cell carries oxygen throughout the body.

• gamete

• platelet

• white blood cell

• red blood cell

How do stem cells know what type of cells to differentiate into?

• The nucleus has instructions to turn some genes on and some genes off.

• Signals from chemicals in the organism or from the environment determine which genes will be turned on and off.

• Genes turn on and off randomly.

• The cell has unique DNA that determines what the cell will become.

Adult stem cells can also be referred to as ______________.

• somatic stem cells

• embryonic stem cells

• starter cells

• IPS cells

Many, but not all, of the somatic stem cells that are found in your body, are considered to be ______________ which means they can become many types of cells

• pluripotent

• imarodent

• multipotent

• Raven

Which type of cell is unspecialized?

• skin cell

• stem cell

• liver cell

• muscle cell

What is cell differentiation?

• The process where unspecialized cells become different in structure and function.

• When DNA controls the cell cycle.

• The ability of cells to make more cells.

• The ability of cells to maintain homeostasis.

Stem cell research is controversial because in involves?

• social issues

• ethical issues

• educational issues

• economical issues