opens wider and for a longer tine than during emptying of a neal. D.Nerves and hormones can modulate the strength of gastric contractions.but do not influence their frequency ESecretin,released from the duodenum in response toacid,has the effect of sloing the rate of gastric emptying. Question#13 Which of the following stateaents is NOT true? The fundus and upper body are relaxed when food enters the stomach B.The only vigorous mixing in the stomach occurs in the antrum. C.Peristaltic waves in the storach begin in mid-body and travel toward the pylorus. D.In a fed individual the pyloric sphincter is open about 40%of the time. 11.C12.D13.D Gastric Secretion Question#】 The transport protein directly responsible for the parietal cells uses the energy of the K+gradient to actively secrete H+into the gastric gland lumen. A.The statenent is TRUE. B.The stateaent is FALSE. The transport of chloride ions into gastric juice is knom to be due toaprimary active transport system A.The statement is TRUE B.The statenent is FALse Question#3 During the cephalic phase of gastricacid secretion.the rate of I secretion may be the maxinal rate. A.The stateaent is TRUE. 及The statement is下lSE opens wider and for a longer time than during emptying of a meal. D. Nerves and hormones can modulate the strength of gastric contractions, but do not influence their frequency. E. Secretin, released from the duodenum in response to acid, has the effect of slowing the rate of gastric emptying. -------------------------------------------------------------------------------- Question # 13 Which of the following statements is NOT true? A. The fundus and upper body are relaxed when food enters the stomach. B. The only vigorous mixing in the stomach occurs in the antrum. C. Peristaltic waves in the stomach begin in mid-body and travel toward the pylorus. D. In a fed individual the pyloric sphincter is open about 40% of the time. -------------------------------------------------------------------------------- Answer： 1.A 2.B 3.A 4.A 5.A 6.E 7.B 8.D 9.E 10.D 11.C 12.D 13.D Gastric Secretion Question # 1 The transport protein directly responsible for the secretion of H+ by parietal cells uses the energy of the K+ gradient to actively secrete H+ into the gastric gland lumen. A. The statement is TRUE. B. The statement is FALSE. -------------------------------------------------------------------------------- Question # 2 The transport of chloride ions into gastric juice is known to be due to a primary active transport system. A. The statement is TRUE. B. The statement is FALSE. -------------------------------------------------------------------------------- Question # 3 During the cephalic phase of gastric acid secretion, the rate of HCl secretion may be 40 to 50% of the maximal rate. A. The statement is TRUE. B. The statement is FALSE