Question #4 The presence of acid.fats.peptides.and hypertonicity are sensed by the duodenal mucosa and elicit responses that regulate gastric emptying.Se of these horones increase the rate of gastric emptying.others decrease the rate of gastric emptying. A.The statement is TRUE. B.The statement is FALSE. Question #5 Action potentials on the crests of slowaves in the stomch are not required for contraction of gastri smooth muscle,but when action potentials do occur,the force of contraction is much greater. A.The statenent is TRUE. B.The statement is FALSE. Question#6 which of the following stateents is FALSE? Contractions of the gastric fundus are absent or very weak B.In a fed individual,the pyloric sphincter opens only briefly in response to each peristaltic wave C.Peristaltic waves begin in mid-body and travel toward the pylorus. D.Gastrin enhances the force of gastric contractions. E During gastric contractions that occur during fasting,the pylorus does notopen as ide as it doe during contractions that occur in a fed individual Question#7 An indigestible object about5m in diameter is likely to be enptied froa the stomach into the duodenu B.The statement is FALSE Question#8 Which of the following statements is FALSE? A.Distention of the duodenum evokes neural reflexes that decrease the rate of gastric emtying. in the e release of CCK and GIF C.Gastrin released froa the duodenum enhances both antral contractions and the constriction of the pyloric sphincter. D.Secretin enhances the strength of antral contractions. E Hypertonicity in the duodenum results in decreased rates of gastric emptying Question # 4 The presence of acid, fats, peptides, and hypertonicity are sensed by the duodenal mucosa and elicit hormonal responses that regulate gastric emptying. Some of these hormones increase the rate of gastric emptying, others decrease the rate of gastric emptying. A. The statement is TRUE. B. The statement is FALSE. -------------------------------------------------------------------------------- Question # 5 Action potentials on the crests of slow waves in the stomach are not required for contraction of gastric smooth muscle, but when action potentials do occur, the force of contraction is much greater. A. The statement is TRUE. B. The statement is FALSE. -------------------------------------------------------------------------------- Question # 6 Which of the following statements is FALSE? A. Contractions of the gastric fundus are absent or very weak. B. In a fed individual, the pyloric sphincter opens only briefly in response to each peristaltic wave. C. Peristaltic waves begin in mid-body and travel toward the pylorus. D. Gastrin enhances the force of gastric contractions. E. During gastric contractions that occur during fasting, the pylorus does not open as wide as it does during contractions that occur in a fed individual. -------------------------------------------------------------------------------- Question # 7 An indigestible object about 5 mm in diameter is likely to be emptied from the stomach into the duodenum by contractions during the gastric phase. A. The statement is TRUE. B. The statement is FALSE. -------------------------------------------------------------------------------- Question # 8 Which of the following statements is FALSE? A. Distention of the duodenum evokes neural reflexes that decrease the rate of gastric emptying. B. Fats in the duodenum elicit the release of CCK and GIP. C. Gastrin released from the duodenum enhances both antral contractions and the constriction of the pyloric sphincter. D. Secretin enhances the strength of antral contractions. E. Hypertonicity in the duodenum results in decreased rates of gastric emptying