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Alpha cells are most commonly found on the dorsal side of the pancreas and are very rarely found on the ventral side of the pancreas. [1] Alpha cells are typically found in compact Islets of Langerhans, which are themselves typically found in the body of the pancreas. [1]
The pancreatic islets or islets of Langerhans are the regions of the pancreas that contain its endocrine (hormone-producing) cells, discovered in 1869 by German pathological anatomist Paul Langerhans. [1] The pancreatic islets constitute 1–2% of the pancreas volume and receive 10–15% of its blood flow.
Enteroendocrine cells are specialized cells of the gastrointestinal tract and pancreas with endocrine function. They produce gastrointestinal hormones or peptides in response to various stimuli and release them into the bloodstream for systemic effect, diffuse them as local messengers, or transmit them to the enteric nervous system to activate nervous responses.
Langerhans cell is represented by a yellow oval; blue arrows correspond to is_a relations, and orange arrows correspond to develops_from relations. Only a subset of Langerhans cell parent types are included in the figure. [1] A Langerhans cell (LC) is a tissue-resident macrophage of the skin [2] once thought to be a resident dendritic cell. [3]
If the blood glucose level falls to dangerously low levels (as during very heavy exercise or lack of food for extended periods), the alpha cells of the pancreas release glucagon, a peptide hormone which travels through the blood to the liver, where it binds to glucagon receptors on the surface of liver cells and stimulates them to break down glycogen stored inside the cells into glucose (this ...
Pancreatic stellate cell; Islets of Langerhans. Alpha cell; Beta cell; PP cell (F cell, gamma cell) Delta cell; Epsilon cell; Pharyngeal pouch. Thyroid gland
In response to insulin, more GLUT4 transporters are relocated from these vesicles to the cell membrane. [1] At the binding of insulin (released from the islets of Langerhans ) to receptors on the cell surface, a signalling cascade begins by activating phosphatidylinositolkinase activity which culminates in the movement of the cytoplasmic ...
Epsilon cells (ε-cells) are one of the five types of endocrine cells found in regions of the pancreas called Islets of Langerhans. [1] Epsilon cells produce the hormone ghrelin that induces hunger. They were first discovered in mice. In humans, these cells compose less than 1% of all islet cells.