Stem cells Flashcards
What do the gametes fertilise to form?
A zygote
What is a zygote?
A single cell which was fused by the fusion of gametes in sexual reproduction
Explain what happens to the zygote in mitosis?
becomes an embryo, then becomes a hollow ball of cell an embryo, the inner cells of this wall are the embryonic stem cells that differentiate to form cells of our body.
What are a good source of adult stem cells?
Bone marrow and skin cells
What happens to people due to stem cells not working?
People suffer and die because their parts of their body is not working properly
Give an example of stem cells not working. (nerve cells)
Spinal injuries, because the nerves cannot repair themselves
Give an example of stem cells not working. (diabetes)
Type 1 diabetes, they have to inject themselves with insulin because of thier specialised cells stopped working in the pancreas
A breakthrough of what with embryonic stem cells?
They have cultured it and can make organs from them as they can differentiate them, can help people with a transplant.
Why are stem cells important for plants?
To produce large numbers of the same plants, cheaper and quicker, it can save plants from extinction and you can make disease resistance plants