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G cell: Wikis

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Control-of-stomach-acid-sec.png

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.

References

  1. ^ iv_1/g/G_cell article at GE's Medcyclopaedia
  2. ^ Guyton, Arthur C.; John E. Hall (2006). Textbook of Medical Physiology (11 ed.). Philadelphia: Elsevier Saunders. p. 797. ISBN 0721602401.  

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