2.1.6 Stem Cells

Question 1

What are stem cells

Answer 1

• Undifferentiated cells that divide by mitosis and differentiate
• can develop into any type of specialised cell to form all types of tissues and organs

Question 2

What are stem cells used for by the body?

Answer 2

• Development
• Growth
• repair

Question 3

What are 2 types of stem cells in animals?

Answer 3

• embryonic

- adult

Question 4

Embryonic stemm cells

Answer 4

Found in embryos, divide by mitosis to produce cells needed to make an organism
Can form all types of cells

Question 5

Adult stem cells

Answer 5

Found in various body tissues (eg.brain,bone marrow, skin, liver)
Able to differentiate into only some types of cells

Question 6

Plant stem cells?

Answer 6

Only meristems:
-very small, thin walls, small vacuoles and no chloroplasts
(Differentiated plant cells cannot divide as their cell wall is too thick)
-part of the plant that grows