USMLE

Gastrin

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Digestive
  1. Gastrin
  2. Pepsin
  3. Amylase
  4. Lipase
  5. Trypsin
  6. CCK
  7. Secretin
  8. GI System
  9. Ingestion
  10. Liver
  11. Bile
  12. Exocrine Pancreas
  13. Endocrine Pancreas
  14. Small Intestine
  15. Large Intestine
  16. GI Nervous Control
  • Gastrin 
    • Peptide hormone produced by G-cells in the stomach
      • Stimulates gastric acid production by parietal cells in stomach
      • Energy-intensive process requiring many mitochondria
      • Stimulated by parasympathetic nervous response (acetylcholine release from the vagus nerve) 
      • Reaching a pH < 3 inhibits gastrin release