S

Enteroendocrine S cells in intestines secreting secretin.

Regulate pancreatic, gastric secretions.

• Stimulate bicarbonate release (Gastroenterology, 2003).
• Respond to acidic chyme (American Journal of Physiology, 2001).
• Found in duodenum (Journal of Clinical Endocrinology & Metabolism, 2005).

Located in intestinal mucosa.