Flashcards in 2b Cell Structure Deck (10):
What is a zygote? (1)
The single cell formed after fertilisation occurs.
How is a 16 cell embryo formed? (2)
- By mitosis (cell division)
- 1 cell > 2 cells > 4 cells > 8 cells > 16 cells
What is differentiation? (1)
- The process whereby cells become specialised, e.g. nerve cells.
What is a stem cell? (1)
- A cell which has the potential to divide many times while remaining undifferentiated/unspecialised.
What are the two types of stem cell? (2)
What are embryonic stem cells? (2)
- Found in early stage development of embryos.
- Can differentiate into any type of cell.
What are adult stem cells? (3)
- Found in particular tissues
- such as bone marrow, lining of small intestine and skin,
- which are unable to differentiate into any type of cell.
What is stem cell therapy? (2)
- Use of stem cells to treat disease
- E.g. bone marrow transplants
Describe the use of stem cell therapy in the treatment of leukaemia (3)
- Leukemia is a type of blood cancer.
- Chemotherapy destroys both healthy and cancerous cells.
- Stem cell therapy supplies stem cells that can divide and differentiate and therefore replace cells lost in chemotherapy.