Alpha cell
Alpha cell
Alpha cells (pronounced: al-fuh sels) are endocrine cells in the pancreas. They constitute approximately 20% of the total Islet of Langerhans cell population.
Etymology
The term "Alpha cell" is derived from the Greek letter "alpha", which is used in biology to denote the first in a series. In this case, it refers to the position of these cells in the islets of Langerhans.
Function
Alpha cells are responsible for synthesizing and secreting the hormone glucagon, which increases the concentration of glucose in the bloodstream. This is the counter-regulatory hormone to insulin, which is produced by the beta cells of the pancreas.
Related Terms
- Glucagon: A hormone produced by alpha cells that raises blood glucose levels.
- Pancreas: An organ in the digestive system that produces important hormones including insulin and glucagon.
- Islet of Langerhans: Clusters of cells in the pancreas that contain alpha cells, among others.
- Beta cell: A type of cell in the pancreas that produces insulin, the hormone that lowers blood glucose levels.
See Also
External links
- Medical encyclopedia article on Alpha cell
- Wikipedia's article - Alpha cell
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