21. The secretion of gastric juice and contraction of smooth muscle in the stomach are regulated by both nervous and hormonal mechanisms. 22. The presence of food in the small intestine during the intestinal phase initiates a neural reflex called the enterogastric reflex. 23. The pancreatic duct that joins the common bile duct from the liver and gallbladder and enters the duodenum is called the ampulla of Vater. 24. In response to acidic chyme that enters the small intestine, the small intestinal mucosa liberates secretin. 25. Which of the following is not stored by the liver? Vitamin C. 26. The mucosa of the small intestine contains many cavities lined with glandular epithelium that secretes intestinal juice called crypts of Lieberkuhn. 27. Which pancreatic protein-digesting enzyme is activated by enterokinase? Trypsinogen.

Views: 5,477 students