Reference no: EM132706524

1. An active transport pump, located in the cell membrane of the parietal cell of the stomach, called "H+/K+ ATPase" is essential for a) the intestinal absorption of the glucose b) neutralizing stomach acid as it enters the duodenum c) the secretion of stomach acid d) the reabsorption of salts by the colon

2. In the someone with a total absence of parietal cells, one would expect to find which of the following: a) Increased digestion and absorption of dietary protein b) decreased absorption of vitamin B12 c) increased growth of stomach bacteria d) B&C e) all of the above

3. The presence of acid (pH less than 3) in the duodenum a) inhibits k cells in the duodenum from releasing gastric via somatostatin b) results in an increase of pancreatic bicarbonate secretion via secretin c) results in a decrease of bile secretion via histamine d) increases gastric acid secretion via parietal cells

4. Stomach emptying is controlled mostly by which of the following? a) local hormone mechanism originating in the stomach itself (ie.; CCK) b) local hormone mechanism originating in the duodenum (ie.; CCK) c) activity of the bacteria in the colon.

5. Chylomicrons are produced in a) the mouth, by the action of lingual lipase b) the stomach, by the action of gastric lipase c) the lumen of the large intestine, as fats are emulsified d) the epithelial cells of the small intestine, as lipids are absorbed d) the lymph, as fats are absorbed

6) maximal rates of pancreatic bicarbonate secretion in response to a meal are due to: a) the effects of secretin b) cholecystokinin released from the duodenal mucosa c) gastrin acting on the chief cells d) acetylcholine released from the vagus nerve

7) the rate of absorption of glucose into the enterocyctes would be. a) increased by adding an equal amount of galactose to the lumen b) increased by adding amino acids to the lumen c) decreased by adding fructose to the lumen d) increased by adding starch to the lumen e) decreased by lowering the concentration of Na+ in the lumen

8. With lipid absorption, which of the following are correct? a) triglycerides are re-synthesized in the smooth endoplasmic reticulum of intestinal cells b) chylomicrons are carried by the lymph before entering the blood circulation c) LDLs carry cholesterol to the cells of the body d) All of the above

9. Which of the following molecules would be the best chance of decreasing stomach emptying into the small intestine a) acetylcholine b) histamine c) gastrin d) cholecystokinin

10. The majority of hydrolysis of disaccharides occurs by the actions of enzymes found a) in the pancreatic juice b) in the brush border of the small intestine c) in the saliva d) in the gastric pits near the endocrine cells