And finally let's move on to our g cells. So the mucous cells are these brown cells the cheap cells are these purple cells the red cells are the parietal cells and these blue cells found all the way at the bottom are the g cells. Now g cells are also easy to remember because g cells as the name implies release a type of hormone known as gastrin. So g cells are found deep in the exocrine glands of the stomach and release a peptide hormone known as gastrin and this peptide hormone stimulates our parietal cells to release hydrochloric acid into the stomach lumen. Now g cells themselves are actually stimulated by our acetylcholine molecule. So acetylcholine stimulates the g cells to release gastrin and the peptide hormone the gastroent stimulates the parietal cells to basically produce hydrochloric acid.