Verana E. Berrong, History of Tarrant County: From Its Beginnings until 1875 (M.A. thesis, Texas Christian University, 1938). Janet L. Schmelzer, Where the West Begins: Fort Worth and Tarrant County (Northridge, California: Windsor, 1985).
Page 4: Parasympathetic and sympathetic nerves innervate the GI tract. â¢ Both parasympathetic and sympathetic divisions of the autonomic nervous. system control digestion by contacting the enteric nervous system in the. wall of the digestive tract. â¢ The parasympathetic division typically stimulates digestion while the. sympathetic division typically inhibits it.
Secretin stimulates the release of a watery bicarbonate solution from the pancreatic and bile duct epithelium. Pancreatic centroacinar cells have secretin receptors in their plasma membrane. As secretin binds to these receptors, it stimulates adenylate cyclase activity and converts ATP to cyclic AMP.