10. Which of the following is NOT a factor that helps create thestomach mucosal barrier, protecting the organ from the digestiveprocess? a. Bicarbonate-rich mucus c. Rapid turnover of mucosalcells b. Tight junctions of mucosa cells d. Secretion ofmotilin

11. The absorptive effectiveness of the small intestine isenhanced by increasing the surface area of the mucosal lining bywhat structural mechanism? a. Villi and microvilli c. Peyerpatches/MALT b. Brush border digestive enzymes d. Rugae &hasutra

12. Which of the following components of saliva are responsiblefor the initial digestive action of breaking down simplecarbohydrates? a. Salivary lipase c. Salivary amylase b. Salivarydefensins & mucins d. Salivary trypsin/chymotrypsin

13. Segmentation, peristalsis, churning, retropulsion, &other key functions of digestive activity are made possible by thislayer of tissue found in hollow GI organs: a. Chymal propria c.Muscularis submucosa b. Lamina propria d. Muscularis externa

14. Which vitamin requires intrinsic factor in order to beabsorbed and where in the digestive system is the vitamin-IFcomplex absorbed? a. Vit A: stomach c. Vit K: ileum b. Vit B12:jejunum d. Vit C: duodenum

15. Which of the following options correctly list a ‘productive’taste type, those that signal beneficial components of fooddetected by major gustatory sensation?

a. Umami, bitter d. Sour, sweet b. Savory, salty e. Sweet,bitter

16. Which of the following is NOT a necessary accessory organ ofthe GI tract?

a. Spleen c. Pancreas b. Liver d. Molars