Stem cells - Animals Flashcards
1
Q
What are stem cells?
A
- undifferentiated cells that has the potential to become any type of cell
2
Q
Where are stem cells found?
A
- In the bone marrow
- embryos
- meristems
3
Q
What can stem cells do?
A
- undergo cell division
- source of new cells necessary for growth, development and tissue repair
4
Q
What does it mean that stem cells are classified to their potency?
A
- stem cells are able to differentiate into different cell types
- the greater the number of cell types it can different into the greater its potency.
5
Q
What is pluripotent?
A
- these stem cells is can form all tissue types but not whole organisms
6
Q
Where are pluripotent cells present in?
A
- present in early embryos and are the origin of the different tissues within organisms
7
Q
How are pluripotent cells useful?
A
- they can be used to create any cell or tissue that the body might need to counter a wide range of diseases
8
Q
What are the ethical issues using pluripotent cells?
A
- involves using human embryos
- they have human life
- should not be destroyed
- embryo has human rights
9
Q
What is totipotent?
A
- they can differentiate to become any type of body cell or extra embryonic tissues
10
Q
Where are totipotent cells present in?
A
- in very early stages embryo, first few mitotic divisions only
11
Q
How are totipotent cells useful?
A
- useful to become any type of cell
- difficult to obtains as discarded IVF embryos are usually larger than 16 cells
12
Q
What are the ethical issues using totipotent cells?
A
- needed for research/treatment
- people object to religion/moral grounds
13
Q
What is multipotent?
A
- these stem cells can form a range of cells with certain types of tissue
14
Q
Where are multipotent cells present in?
A
- bone marrow
15
Q
How are multipotent cells useful?
A
- differentiate into a tissue such as bone,muscle
- treatments for various diseases such as spinal cord injury
