Ch 21

Which of the following is secreted by the chief cells of the gastric mucosa? a. lipase b. trypsin c. pepsinogen (inactive precursor to pepsin) d. HCl e. amylase

c. pepsinogen (inactive precursor to pepsin)

The digestive enzyme pepsin, secreted by gastric glands, begins the digestion of: a. fats b. carbohydrates c. proteins

c. proteins

Bile is: a. secreted by hepatocytes and manufactured by the gallbladder b. released into the stomach only c. secreted by hepatocytes only d. manufactured by the gallbladder only e. secreted by hepatocytes, manufactured by the gallbladder, and released into the stomach

c. secreted by hepatocytes only

The portion of the large intestine that receives digestive materials from the small intestine: a. transverse colon b. descending colon c. ascending colon d. cecum e. sigmoid colon

d. cecum

The role of bile in digestion of fats is: a. dehydration b. denaturation c. forming enzymes d. emulsification

d. emulsification

Intrinsic factor: a. neutralizes HCl in the small intestine b. is produced as a result of H. pylori infection c. secretion increases in the elderly d. is required for B12 absorption e. is secreted by the pancreas

d. is required for B12 absorption

Which statement best describes the duodenum? a. it is the middle portion of the small intestine b. it is directly attached to the large intestine c. it forms the majority of the small intestine d. it is C-shaped, short, and at the beginning of the small intestine

d. it is C-shaped, short, and at the beginning of the small intestine

Which of the following is a brush border enzyme? a. pepsin b. trypsin c. amylase d. maltase

d. maltase

Pancreatic cells secrete: a. HCl b. mucus c. enzymes d. more than one of these e. bicarbonate

d. more than one of these

Which layer or layers of the wall of the GI tract contain a nerve plexus? a. muscularis b. mucosa and muscularis c. mucosa and adventitia/serosa d. submucosa and muscularis e. adventitia/serosa

d. submucosa and muscularis

Which of the following is not a function of the liver? a. forms blood plasma proteins, such as albumin and globulin b. detoxification c. stores vitamins d. they are all functions of the liver e. makes cholesterol

d. they are all functions of the liver

The gall bladder _____________. a. concentrates pancreatic juice b. dilutes bile c. produces bile d. dilutes pancreatic juice e. concentrates bile

e. concentrates bile

Secreted by cells in the stomach: Select one: a. secretin b. motilin c. cholecystokinin d. gastric inhibitory peptide e. gastrin

e. gastrin

Peristalsis: a. only occurs in the esophagus b. none of the answers are correct c. is a condition wherein the lining of the digestive tract is irritated by the passage of rough fibrous material d. is a muscular movement pattern that occurs in regions of the digestive tract where the smooth muscle fibers are not arranged in layers e. is waves of muscular contractions that move along the length of the digestive tract

e. is waves of muscular contractions that move along the length of the digestive tract

The muscular layer farthest from the lumen is the: a. none of the answer choices are correct b. circular layer of the muscularis externa c. muscularis mucosae d. oblique layer of the muscularis externa e. longitudinal layer of the muscularis externa

e. longitudinal layer of the muscularis externa

Sandwiched between the layer of circular and longitudinal muscle in the muscularis externa is the: a. mucosa b. mesocolon c. muscularis mucosa d. submucosa e. myenteric plexus

e. myenteric plexus

Which of the following enzymes is most active at an acidic pH? a. trypsin b. all of the choices are correct c. amylase d. lipase e. pepsin

e. pepsin

The organ where most digestion occurs: a. rectum b. stomach c. pancreas d. pylorus e. small intestine

e. small intestine

Sulfuric acid is produced by the stomach. a. false b. true

a. false (it is HCl acid)

Most absorbed nutrients first enter the blood of the ________ system. a. hepatic portal b. arterial

a. hepatic portal

Which cells secrete intrinsic factor? a. parietal cells b. cells in villi of duodenum c. G cells d. chief cells e. mucous neck cells in stomach

a. parietal cells

Which one of the following enzymes does NOT function in the small intestine? a. pepsin b. maltase c. sucrase d. pancreatic amylase

a. pepsin

Chief cells secrete: a. pepsinogen b. hydrochloric acid c. mucus d. gastrin e. intrinsic factor

a. pepsinogen

The major site for protein digestion is: a. small intestine b. large intestine c. stomach d. mouth

a. small intestine

The gall bladder: a. stores bile b. produces bile c. dilutes bile d. concentrates pancreatic juice e. dilutes pancreatic juice

a. stores bile

Pepsin is secreted by the chief cells. a. true b. false

a. true

Water and electrolyte absorption is a primary function of the large intestine. a. true b. false

a. true

In areas where the digestive tract is not covered in serosa it is covered by a fibrous connective tissue called: a. the plexus of Auerbach b. adventitia c. none of the answer choices are correct d. peritoneum e. mucosa

b. adventitia

Functions of the digestive system include which of the following? a. ingestion of foods and liquids b. both ingestion and processing of food materials and liquids c. boosting expiratory efficiency by lifting the diaphragm via intestinal gas secretions d. warming the body with heat released from the digestive organs as they process food e. processing of food materials and liquids

b. both ingestion and processing of food materials and liquids

Pepsin completely (100 percent) digest proteins. a. true b. false

b. false

The lymphatic vessels found within the intestinal villi are called: a. lymphatic trunks b. lacteals c. cisterna chyli d. lymphatic ducts

b. lacteals

Parietal cells secrete: a. intrinsic factor b. more than one of the answers is correct c. mucus d. HCO3- e. HCl

b. more than one of the answers is correct

Pancreatic cells secrete: a. HCl b. more than one of these c. enzymes d. mucus e. bicarbonate

b. more than one of these

Which cells secrete intrinsic factor? a. G cells b. parietal cells c. chief cells d. mucous neck cells in stomach e. cells in villi of duodenum

b. parietal cells

Nutrient absorption occurs primarily in the: a. large intestine b. small intestine c. stomach d. stomach and small intestine e. liver

b. small intestine

The parietal cells of the gastric mucosa secrete: a. pepsinogen (inactive precursor to pepsin) b. amylase c. HCl d. lipase e. trypsin

c. HCl

The _________ of the stomach secrete pepsinogen. a. parietal cells b. surface mucous cells c. chief cells d. enteroendocrine cells e. mucous neck cells

c. chief cells

Which of the following is NOT a function of the liver? a. makes cholesterol b. synthesizes urea c. makes ACTH d. forms blood plasma proteins, such as albumin and globulin

c. makes ACTH

Hydrochloric acid is secreted by: a. mucous neck cells b. chief cells c. parietal cells d. enteroendocrine cells e. goblet cells

c. parietal cells