1. With respect to stem cell therapy answer the following questions:
a) What are stem cells
b) How are stem cells preserved?
c) What are the two types of stem cells based on the sources?
d) What are the sources of stem cells?
e) Give the two uses of stem cells.
Answers
Explanation:
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Answer:
a) Stem cells are the body's raw materials — cells from which all other cells with specialized functions are generated. Under the right conditions in the body or a laboratory, stem cells divide to form more cells called daughter cells.
b)After collection, cord blood is delivered to the stem cell laboratory, where it is processed to extract the stem cells, as well as detect any viruses and bacteria. Then stem cells are frozen with the help of a special programme and preserved in liquid nitrogen at –196°C.
c)Embryonic stem cells. Embryonic stem cells come from human embryos that are three to five days old. ...
Non-embryonic (adult) stem cells. ...
Induced pluripotent stem cells (iPSCs) ...
Cord blood stem cells and amniotic fluid stem cells.
d)Stem cells may be obtained from various sources such as bone marrow, fat, blood, umbilical cord and embryonal tissue. Allograft stem cells are obtained from a donor or tissue bank. Vertebral bodies of deceased donors have a high concentration of stem cells and are ideal for allograft stem cell therapy.
e)In stem cell transplants, stem cells replace cells damaged by chemotherapy or disease or serve as a way for the donor's immune system to fight some types of cancer and blood-related diseases, such as leukemia, lymphoma, neuroblastoma and multiple myeloma. These transplants use adult stem cells or umbilical cord blood.
Explanation:
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