In anatomy, the G cell is a type of cell in the stomach that secretes gastrin. It works in conjunction with gastric chief cells and parietal cells.
G cells are found deep within the gastric glands of the stomach antrum, and occasionally in the pancreas.[1]
The vagus nerve innervates the G cells.
Gastrin-releasing peptide is released by the post-ganglionic fibers of the vagus nerve onto G cells during parasympathetic stimulation.
Gastrin-releasing peptide, as well as the presence of amino acids in the stomach, stimulate the release of gastrin from the G cells. Gastrin stimulates enterochromaffin-like cells to release histamine.[2]
Gastrin also targets parietal cells by increasing the amount of histamine and the direct stimulation by gastrin, causing the parietal cells to increase HCl secretion in the stomach.
[edit] References
- ^ iv_1/g/G_cell article at GE's Medcyclopaedia
- ^ Guyton, Arthur C.; John E. Hall (2006). Textbook of Medical Physiology (11 ed.). Philadelphia: Elsevier Saunders. p. 797. ISBN 0721602401.
tt cells
[edit] External links