51) Which of the following digestive enzymes is produced by the stomachs of newborns, but not adults?

A) trypsin

B) CCK

C) intrinsic factor

D) gastric lipase

E) pepsin

52) Gastrin causes

A) inhibition of HCl secretion.

B) increases in the secretion of chief cells and parietal cells.

C) the change of pepsin into pepsinogen..

D) the upper esophageal sphincter to open.

E) the pyloric sphincter to open.

53) In the fundus and body of the stomach, gastric glands extend deep into the ________.

A) adventitia

B) lamina propria

C) serosa

D) muscularis externa

E) submucosa

54) Rugae are

A) mucosal ridges in the stomach.

B) involved in absorption of liquids from the stomach.

C) pockets in the lining of the stomach that contain secretory cells.

D) located in the esophagus.

E) present when the stomach is at maximum distention.

55) During the cephalic phase of gastric secretion,

A) the stomach responds to distention.

B) secretin inhibits parietal and chief cell action.

C) neural output to the stomach proceeds by way of the parasympathetic division of the ANS.

D) the intestine reflex inhibits gastric emptying.

E) production of gastric juice slows down.

56) The gastric phase of gastric secretion begins with

A) the sight, thought, or smell of food.

B) the arrival of food in the stomach.

C) the entry of chyme into the small intestine.

D) the entry of chyme into the large intestine.

E) the release of cholecystokinin and secretin by the small intestine.

57) Which of the following is(are) a potent stimulator(s) of gastrin?

A) proteins, small doses of alcohol, and caffeine

B) parasympathetic innervation

C) the sight of food

D) the smell of food

E) chyme entering the esophagus

58) Which statement regarding the regulatory controls of the intestinal phase of gastric secretion is true?

A) Neural controls are excitatory, but endocrine controls are inhibitory.

B) Endocrine controls are excitatory, but neural controls are inhibitory.

C) There are no regulatory controls during the intestinal phase.

D) Both neural and endocrine controls are excitatory.

E) Both neural and endocrine controls are inhibitory.

59) The intestinal lining bears a series of transverse folds called ________.

A) rugae

B) mucous glands

C) villi

D) circular folds

E) microvilli

60) In the duodenum, submucosal glands secrete which of the following?

A) gastrin

B) an alkaline mucus

C) pepsin

D) secretin

E) cholecystokinin