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.
1 Gastrin is secreted by stomach. 2  The presence of food in the stomach stimulates secretion of the gastrin into the circulatory system. 3  Gastrin in-turn stimulates the secretion of gastric juice in the stomach. 4  Secretin is secret by duodenum cells.  Secretin secretion is stimulating by acid chyme (food from stomach).