EVERYDAY SCIENCE

SCIENCE

CELL BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
B1.1.1 Adult humans have some stem cells in them, true or false?
A
True
B
False
C
Either A or B
D
None of the above
Explanation: 

Detailed explanation-1: -Where are stem cells found? Adult stem cells have been found in most parts of the body, including brain, bone marrow, blood vessels, skin, teeth and heart. There are typically a small number of stem cells in each tissue.

Detailed explanation-2: -Estimates vary on the number of blood stem cells, with a recent paper reporting a range of 50, 000-200, 000 in a healthy adult person. Secondly, in terms of cell identity, there are also gray areas where we aren’t always sure whether a given cell is a stem cell or some other similar cell type like a progenitor cell.

Detailed explanation-3: -Adult stem cells They are extremely rare. For example, only an estimated 1 in 10, 000 to 15, 000 hematopoietic cells is a hematopoietic stem cell (HSC) in the HSC niche (Weissman, 2000), yet a single ASC can give rise to thousands of differentiated cells.

Detailed explanation-4: -Types of Adult Stem Cells: Hematopoietic Stem Cells (Blood Stem Cells) Mesenchymal Stem Cells. Neural Stem Cells. Epithelial Stem Cells.

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