Test Bank Gastrointestinal Physiology Already Passed

Which of the following factors will not influence the rate at which a meal will empty from the stomach? A. fat in the duodenum B. acid in the duodenum C. caffeine in the duodenum D. hypertonicity of the duodenal contents E. distention of the duodenum {Ans: C. caffeine in the duodenum}Maximum absorption of short-chain fatty acids produced by bacteria occurs in the A. stomach. B. duodenum. C. jejunum. D. ileum. E. colon. {Ans: E. colon.}Mass movements are often stimulated after a meal by distention of the stomach and distention of the duodenum. Mass movements often lead to which of the following? A. Bowel movements B. Gastric movements C. Haustrations D. Esophageal contractions E. Pharyngeal peristalsis {Ans: A. Bowel movements}Gastric pressures seldom rise above the levels that breach the lower esophageal sphincter, even when the stomach is filled with a meal, due to which of the following processes? A. Peristalsis B. Gastroileal reflex C. Segmentation D. Stimulation of the vomiting center E. Receptive relaxation {Ans: E. Receptive relaxation}Which of the following would eliminate receptive relaxation of the lower esophageal sphincter and fundus portion of the stomach? A. Increased serum gastrin B. Increased serum secretin C. Sympathectomy D.