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19. Definition, types and organ examples of hyperplasia: Difference between revisions

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19. Definition, types and organ examples of hyperplasia (view source)

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(Created page with "Hyperplasia is an increase of the number of cells in an organ or tissue by cell division, resulting in an increase in the mass of the organ. There are different types of hyperplasia: == Physiological hyperplasia == There are two types of physiological hyperplasia, hormonal and compensatory. * Hormonal hyperplasia ** This is the increase of functional capacity of an organ when its needed. ** An example is when a woman is ''pregante'' and the glandular epithelium of the...")
 
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We can divide all cells into one of three types: Labile, stable or permanent cells. Labile cells and stable cells can proliferate, while permanent cells cannot.
We can divide all cells into one of three types: Labile, stable or permanent cells. Labile cells and stable cells can proliferate, while permanent cells cannot.


Labile cells are cells that are continuously in the cell cycle, like epidermis cells and the mucosa of <abbr>GI</abbr>-tract that regenerate itself often, so the tissues made up of them undergo hyperplasia every day.
Labile cells are cells that are continuously in the cell cycle, like epidermis cells and the mucosa of GI-tract that regenerate itself often, so the cells making up these tissues proliferate constantly.


Stable cells are often paused in the G0-phase, but will enter the cell cycle if needed, like hepatocytes in the liver.
Stable cells are often paused in the G0-phase, but will enter the cell cycle if needed, like hepatocytes in the liver.