3M Stem cells and specialization (cardiovascular system)

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

a cell that has the most potential, able to become any type of cell.

• Totipotent

• Pluripotent

• Multipotent

can become any of the three cell layers in a

developing embryo (endoderm, mesoderm, ectoderm), but not the placenta surrounding the embryo.

• Totipotent

• Pluripotent

• Multipotent

partially differentiated, with only the capacity to become one cell type.

• Totipotent

• Pluripotent

• Multipotent

Which has the lowest potency?

• Morula

• Blastocyst

• Fetus

• Adult

As cells become more specialized

• cells have access to more genes

• some genes are turned off

• some gene segments get lost

Stem cells can be obtained from _________.

• embryos
• some adult tissues
• umbilical cord blood
• all of the above

Why is the use of embryonic stem cells controversial?

• The embryos are destroyed in the process of extracting the stem cells.

• People consider their use as destroying a life.

• They are taken from little kids, which is painful.

• They are put into a different person.

Which of the following is associated with oxygenated blood?

• Aorta

• Pulmonary Artery

• Septum

• Right Ventricle

What part of the heart divides the heart into two?

• Biscuspid valve

• Septum

• Pulmonary artery

• bicep