stem cells

Question 1

unique features of stem cells

Answer 1

1. undifferentiated, unspecialised cells
2. capable of undergoing extensive proliferation and self renewal through mitosis
3. can differentiate into various specialised cells upon stimulation by molecular signals

Question 2

why is it important

Answer 2

needed in development, cellular regenration and repair

Question 3

what cells cannot undergo mitosis

Answer 3

specialised cells: white blood cells, red blood cells etc

Question 4

what is a totipotent stem cell

Answer 4

• able to differentiate into all of the cell times that make up an organism including the placenta
• can form an entire organism
  e.g. zygotic stem cell, cells formed within the FIRST THREE DIVISIONS

Question 5

what is a pluripotent stem cell

Answer 5

• ability to differentiate into ALL of the cell types that make up an organism EXCEPT the placenta
• cannot form the entire organism

Question 6

what are embryonic stem cells