A At high rates of secretion the concentration of H+in gastric juice rises. B.Duodenal ulcer patients secrete Cl at a greater rate than normal patients in response to stimulation retettheof the secretorycthe D.Cl-enters the parietal cell across the basolateral membrane against an electrochemical potential gradient. E None of the above Question#10 Which statement about gastric secretion is NT true. A.An effectivegastric mucosal barrier"requires the secretion of both bicarbonate and mucus by gastric epithelial cells. B.When a parietal cell is stimulated to secrete.tubovesicles fuse with the plasma membrane that lines the seretory canaliculus .The rates of secretion of HCl and intrinsic factor are most often reciprocally related. D.G cells in the pyloric glands release gastrin when stimulated by peptides and anino acids E.None of the above. Question 1l thich statement about gastric secretion is NOT correct A.Histamine,gastrin,and acetylcholine are three physiological agonists for Hl secretion by parietal cells. B.H2 receptor blockers can block most HCI secretion evoked by gastrin oror acetylcholine. C.Truncal vagotomy will abolish the gastric phase of HCl secretion. D.Early in the intestinal phase,I secretion is stimlated by gastrin released fromG cells in the o enum and upper jejunum. E None of the above. Question 12 Which of the following statements is NOT true? AAcetylcholine,histamine and gastrin are agonists of CI secretion at the parietal cell level. B.When parietal cells are stimulated to secrete,tubovesicles containing the K+,H-ATPase fuse with the nembrane of the secretory canaliculus. B.C.Both H and Cl-are actively secreted into the gastric lumen. D.The chloride-bicarbonate exchanger in the basolateral plasma membrane of the parietal cell plays an important role in I secretion. E.None of the above. A. At high rates of secretion the concentration of H+ in gastric juice rises. B. Duodenal ulcer patients secrete HCl at a greater rate than normal patients in response to stimulation by agonists. C. H+ is actively secreted into the lumen of the secretory canaliculus by the action of the H+, K+-ATPase. D. Cl- enters the parietal cell across the basolateral membrane against an electrochemical potential gradient. E. None of the above. -------------------------------------------------------------------------------- Question # 10 Which statement about gastric secretion is NOT true. A. An effective "gastric mucosal barrier" requires the secretion of both bicarbonate and mucus by gastric epithelial cells. B. When a parietal cell is stimulated to secrete, tubovesicles fuse with the plasma membrane that lines the secretory canaliculus. C. The rates of secretion of HCl and intrinsic factor are most often reciprocally related. D. G cells in the pyloric glands release gastrin when stimulated by peptides and amino acids. E. None of the above. -------------------------------------------------------------------------------- Question # 11 Which statement about gastric secretion is NOT correct. A. Histamine, gastrin, and acetylcholine are three physiological agonists for HCl secretion by parietal cells. B. H2 receptor blockers can block most HCl secretion evoked by gastrin or or acetylcholine. C. Truncal vagotomy will abolish the gastric phase of HCl secretion. D. Early in the intestinal phase, HCl secretion is stimulated by gastrin released from G cells in the duodenum and upper jejunum. E. None of the above. -------------------------------------------------------------------------------- Question # 12 Which of the following statements is NOT true? A. Acetylcholine, histamine, and gastrin are agonists of HCl secretion at the parietal cell level. B. When parietal cells are stimulated to secrete, tubovesicles containing the K+,H+-ATPase fuse with the membrane of the secretory canaliculus. B. C.Both H+ and Cl- are actively secreted into the gastric lumen . D. The chloride-bicarbonate exchanger in the basolateral plasma membrane of the parietal cell plays an important role in HCl secretion. E. None of the above. --------------------------------------------------------------------------------