Ch 24 Digestion
13) The activities of the digestive system are regulated by A) parasympathetic and sympathetic neurons. B) hormones C) intrinsic nerve plexuses. D) the contents of the digestive E) all of the above
E
14) The functions of the oral cavity include all of the following, except A) analysis of material before swallowing B) lubrication C) mechanical processing of lood D) digestion of carbohydrates E) absorption of monosaccharides
E
20) Which region of the somach does the esophagus connect to A) pylorus B) fundus C) antrum D) body E) cardia
E
23) The region of the stomach that empties into the duodenum is the A) cardia. B) fundus C antrum D body. E) pylorus
E
26) The enzyme pepsin digests A) lipids B) carbohydrates C) nucleic acids D) vitamins E) proteins
E
11) A feature of the digestive epithelium that assists expansion of the organ is the presence of A) elastic cells B) plicae C) Transiticeal cells D) rugae E) both B and D
D
41) are arranged within a lobule of the liver into a series of plates converging toward a central vein. A) Hepatocytes B) Hepatic ducts C) Portal areas D) Kupffer cells E) Bile canaliculi
A
44) The pancreas produces....digesting enzymes in the form of proenzymes. A) protein B) nucleic acid C) sugar D) lipid E) carbohydrate
A
52) The enzyme amylase digests A) polysaccharides B) peptides. C) disaccharides. D) nucleotides E) triglycerides.
A
6) Which of these descriptions best matches the term mesenteric plexus? A) coordinates activity of muscularis externa B) component of mucosa C) loose connective tissue layer containing blood vessels D) sensory neural network E) secretes a watery fluid
A
7) Coneraction of the alters the shape of the intestinal lumen and moves epithelial pleats and folds A) muscularis mucosa B) submucosa C) adventitia D) mucosa E) submucosal plesus
A
8) The are double sheets of peritoneal membrane that suspend the visceral organs and carry nerves, lymphatics, and blood vessels A) mesenteries B) lamina propria C) adventitia D) serosa E) fibrosa
A
16) Functions of the stomach include all of the following, except A) initiation of protein digestion B) absorption of triglycerides C) mechanical breakdown of food D) storage of ingested food E) denaturation of proteins
B
18) Chief cells secrete A) gastrin B) pepsinogen C) mucus D) HCl E) intrinsic factor
B
22) The part of the stomach that functions as a mixing chamber for food and secretions is the A) cardia B) body C) antrum D) pylorus E) fundus
B
35) An intestinal hormone that stimulates the release of insulin from the pancreatic islet cells is A) secretin B) gastric inhibitory peptide (GIP) C) cholecystokinin D) enteropeptidase E) enterocrinin.
B
40) The basic functional unit of the liver is the A) portal area. B) lobule C) Kupffer cell D) hepatocyte E) bile canaliculus
B
45) The structure that marks the division between the right and left lobes of the liver is the A) greater omentum B) falciform ligament. C) lesser omentum D) hepatic ligament E) ligamentum teres.
B
54) Carbohydrate digestion begins in the A) stomach B) mouth C) ileum D) esophagus E) duodenum.
B
9) Sensory nerve cells, parasympathetic ganglia, and sympathetic postganglionic fibers can be found in the A) serosa B submucosal plexus C) lamina propria D) mucosa E) adventitia
B
15) Which of the following is false about secretions from the salivary glands? A) are mostly water B) contain enzymes for the digestion of polysacchanides C) help control bacterial populations in the mouth D) contain enzymes for the digestion of disaccharides E) help lubricate the oral cavity and its contents
D
10) A stratified squamous epithelial lining can be found in all of the following except in the A) anal canal B) esophagus C) oropharynx D) oral cavity E) stomach
E
1) Each of the following organs is a component of the digestive tract, except A) bladder B) pharynx C) esophagus D) stomach E) colon
A
21) The portion of the stomach that is superior to the junction between the stomach and the esophagus is the A) fundus. B) pylorus C) cardia D) body E) antrum
A
29) The pylorus empties into the A) duodenum B) colon. C) ileum D) jejunum E) cecum
A
32) An intestinal hormone that stimulates mucus secretion by the submucosal duodenal glands is A) enterocrinin B) secretin C) gastrin D) GIP E) cholecystokinin
A
36) An intestinal hormone that stimulates gastric secretion is A) gastrin. B) cholecystokinin C) secretin D) gastric inhibitory peptide (GIP) E) enteropeptidase
A
38) The exocrine portion of the pancreas is composed of A) pancreatic acini B) pancreatic lobules C) pancreatic crypts D) triads. E ) islets of Langerhans .
A
12) Waves of muscular contractions that propel the contents of the digestive tract are called A) pendular movements B) segmentation C) peristalsis D) churning movements E) mastication
C
19) G cells of the stomach secrete A) pepsen B) secretion C) gastrin D) enteropeptidase E) cholecystokinin
C
24) The grealer omentum is A) a sheet of mesentery that attaches to the lver. B) the entrance to the stomach C a fatty sheet that hangs like an apron over the abdominal viscera D) attached at the stomach at the lesser curvature E)important in the digestion of fats
C
25) Gastric pits are A) hollows where proteins are stored. B) ridges in tha body of the stomach C) openings in the gastric gland d) involved in absorption of liquids from the stomach . E)acid scars in the esoplagus
C
28) Brunner glands are characterisic of the A) ileum B) stomach C) duodenum D) jejunim E) colon
C
3) Digestion refers to the A) mechanical beeakdown of food B) progressive dehydration of indegistable residue C) chemical breakdown of food D) B and C only E) A, B, and C
C
30) The middle segment of the small intestine is the A) duodenum B) cecum C)jejunum D) pylorus E) ileum.
C
37) The fusion of the hepatic duct and the cystic duct forms the A) porta hepatis B) common pancreatic duct C) common bile duct. D) hepatic portal vein E) bile canaliculus
C
4) Which of the following is not a function of the digestive system? A) ingestion B) mechanical processing C) filtration D) absorption E) compaction
C
48) The gastric phase of gastric secretion is triggered by the A) entry of chyme into the small intestine B) entry of chyme into the large intestine C) entry of food into the stomach. D) release of cholecystokinin and secretin by the small intestine. E) sight, thought, or smell of food
C
49) All of the following are true of the intestinal phase of gastric digestion, except that it A) begins when chyme enters the small intestine B) functions to control the rate of gastric emptying. C) precedes the gastric phase D) involves both neural and endocrine reflexes E) helps ensure that the functions of the smal intestine proceed with relative efficiency
C
17) Parietal cells secrete A) enteropeptidase B) pepsinogen C) mucus D) HCL E)gastrin
D
2) Which of the following is an accessory organ of digestion A) colon B) esophagus C) spleen D) pancreas E) appendix
D
27 The duodenal ampulla receives secretions from the A) duodenum and the bile duct B) duodenum and the pancreiatic duct C ) duodenum and the Pylorus D) common bile duct and the pancreatic duct E) duodenum and the jeunum
D
31 ) The portion of the small intestine that attaches to the cecum is the A) haustrum B) appendix C) jejunum D) ileum E) duodenum
D
34) An intestinal hormone that stimulates the gallbladder to release bile is A) enteropeptidase B) gastrin. C) secretin D) cholecystokinin E) GIP
D
43) The pancreas produces A) nucleases. B ) lipases and amylase C) peptidases and proteinases D) all of the above E) A and C only
D
50) Enzymes secreted by the pancreas include A) trypsin (as trypsinogen) B) amylase C) lactase D) A and B only E) A, B, and C
D
53) An enzyme that digests proteins into peptides is A) amylase. B) lipase. C) nuclease. D) trypsin. E) maltase
D
33) The intestinal hormone that stimulates the pancreas to release a watery, bicarbonate-rich fluid is A) enterocrinin B) gastrin C) cholecystokinin D) GIP E) secretin.
E
39) Each of the following is a function of the liver, except A) inactivation of toxins B) synthesis and secretion of bile C) synthesis of plasma proteins D) storage of glycogen and iron reserves. E) antibody production
E
42) The Kupffer cells of the liver A) destroy RBCs B) destroy bacteria. C) are phagocytic D) present antigens E) all of the above
E
46) Bile is stored in the A) duodenum. B) appendix C) pancreas D) liver E) gallbladder
E
47) During the cephalic phase of gastric secretion, A) the stomach responds to distention B) secretin inhibits parietal and chief cells C) production of gastric juice slows down. D) the intestinal reflex inhibits gastric emptying E) there is an increased flow of action potentials along the vagus nerve to the stomach.
E
5) The lamina propria and mucous epithelium are components of the A) macularis mucosa B) serosa C) submucosa D) adventitia E) mucosa
E
51) Functions of the large intestine include A) absorption of bile salts B) absorption of vitamins C) resorption of water and compaction of feces. D) all of the above E) B and C only
E
