Ch 24 Digestive System
134) If the lingual frenulum is too restrictive, an individual A) has a condition called ankyloglossia. B) has difficulty eating. C) cannot speak normally. D) all of the above E) A and C only
D
88) 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
93) The saclike structure that joins the ileum at the ileocecal valve is the A) appendix. B) sigmoid colon. C) rectum. D) haustra. E) cecum.
E
97) An enzyme that digests proteins into peptides is A) lipase. B) amylase. C) nuclease. D) maltase. E) trypsin.
E
54) Submucosal glands that secrete mucus are characteristic of the A) duodenum. B) jejunum. C) ileum. D) pancreas. E) liver.
A
158) Mary had her stomach mostly removed to try to overcome obesity. As a result you would expect Mary to be at risk for A) protein malnutrition. B) pernicious anemia. C) diarrhea. D) dehydration. E) an ulcer.
B
44) The portion of the stomach that is superior to the junction between the stomach and the esophagus is the A) cardia. B) pylorus. C) fundus. D) antrum. E) body.
C
57) Peyer patches are characteristic of the A) stomach. B) duodenum. C) jejunum. D) ileum. E) colon.
D
85) 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
86) The gastroileal reflex A) empties the duodenum. B) promotes gastric secretion. C) decreases peristaltic activity. D) moves some chyme to the colon. E) is relayed through the CNS.
D
145) The part of the small intestine most likely to develop an ulcer from exposure to gastric juice is the A) pylorus. B) duodenum. C) ileum. D) caecum. E) jejunum.
B
16) Your patient with liver failure has a firm rounded abdomen due to accumulation of fluid. This is known clinically as ________.
ascites
170) The structure labeled ʺ5ʺ A) contributes to the mesentery of the small intestine. B) has a simple squamous epithelium. C) is part of the visceral peritoneum. D) is called the serosa. E) all of the above
E
116) What provides access for blood vessels entering and leaving the liver? A) falciform ligament B) greater omentum C) mesentery proper D) lesser omentum E) diaphragm
D
133) The essential functions of the liver include A) metabolic regulation. B) hematological regulation. C) bile production. D) all of the above E) A and C only
D
84) All of the following are true of the intestinal phase of gastric digestion, except that it A) precedes the gastric phase. B) functions to control the rate of gastric emptying. C) involves both neural and endocrine reflexes. D) helps ensure that the functions of the small intestine proceed with relative efficiency. E) begins when chyme enters the small intestine.
A
13) People who lack the enzyme ________ often experience GI upset after consuming milk and other dairy products.
lactase
11) Maltose is hydrolyzed into monosaccharides by the enzyme ________.
maltase
5) The technical term for chewing is ________.
mastication
131) The part of the digestive tract that plays the primary role in the digestion and absorption of nutrients is the A) cecum. B) jejunum. C) stomach. D) duodenum. E) colon.
B
138) Blockage of the common hepatic duct would interfere with digestion of A) proteins. B) fats. C) disaccharides. D) complex carbohydrates. E) vitamins.
B
108) Which organ is responsible for dehydration and compaction of indigestible materials? A) small intestine B) esophagus C) large intestine D) stomach E) anus
C
111) Which of the following is not a component of the hepatic triad found at the edges of a liver lobule? A) hepatic artery B) bile duct C) central vein D) hepatic portal vein E) None of the above all are present in the hepatic triad.
C
118) All of the following contain mucous cells in the epithelium, except the A) stomach. B) transverse colon. C) esophagus. D) small intestine. E) large intestine.
C
13) A stratified squamous epithelial lining can be found in all of the following, except in the A) anal canal. B) esophagus. C) stomach. D) oropharynx. E) oral cavity.
C
21) The ________ gland empties into the oral cavity at the level of the second upper molar. A) submaxillary B) submandibular C) parotid D) sublingual E) vestibular
C
24) The bulk of each tooth consists of a mineralized matrix similar to that of bone called A) enamel. B) cementum. C) dentin. D) pulp. E) periodontium.
C
33) The connection of the anterior portion of the tongue to the underlying epithelium is the A) uvula. B) faux. C) lingual frenulum. D) labial frenulum. E) glossal septum.
C
42) G cells of the stomach secrete A) cholecystokinin. B) secretin. C) gastrin. D) enteropeptidase. E) pepsin.
C
47) The prominent ridges in the lining of the empty stomach are called A) cardia. B) papillae. C) rugae. D) plicae. E) villi.
C
1) Each of the following organs is a component of the digestive tract, except the A) stomach. B) pharynx. C) esophagus. D) bladder. E) colon.
D
10) Sandwiched between the layer of circular and longitudinal muscle in the muscularis externa is the A) mucosa. B) submucosa. C) muscularis mucosa. D) myenteric plexus. E) submucosal plexus.
D
101) The digestive tract is also referred to as the A) alimentary canal. B) esophagus. C) GI tract. D) both A and C E) all of the above
D
105) Which of these descriptions best matches the term cholecystokinin (CCK)? A) where pancreatic juice and bile enter duodenum B) carries absorbed sugars and amino acids C) stimulates pancreas to secrete bicarbonate-rich fluid D) causes gall bladder to contract E) stimulates gastric secretion
D
106) The ________ mechanically digests ingested food. A) small intestine B) esophagus C) large intestine D) stomach E) anus
D
119) Which of the following is surrounded by a serosa? A) rectum B) pharynx C) esophagus D) small intestine E) oral cavity
D
35) ________ are blade-shaped teeth that function in cutting or clipping. A) Canines B) Bicuspids C) Cuspids D) Incisors E) Molars
D
6) The small, semisolid mass of food formed during mastication is called a(n) ________
bolus
1) The oral cavity is also known as the ________ cavity.
buccal
10) The enzyme that digests starch into disaccharides and trisaccharides is ________.
amylase
19) The oral cavity performs sensory ________ prior to swallowing.
analysis
122) The oral mucosa has ________ epithelium. A) simple squamous B) stratified squamous C) pseudostratified D) stratified columnar E) transitional
B
21) A viral infection that often involves the parotid glands, which swell noticeably, is ________.
mumps
132) The hormone that stimulates secretion and contraction by the stomach is A) gastrin. B) enteropeptidase. C) secretin. D) cholecystokinin. E) CCK.
A
143) Which of the following is greater? A) the pH of the blood in gastric veins during digestion of a large meal B) the pH of the blood in gastric veins following a 24-hour fast C) Can be either. D) Blood pH is constant because of buffering.
A
146) In response to the arrival of acid chyme in the duodenum, the A) blood levels of secretin rise. B) blood levels of cholecystokinin fall. C) blood levels of gastrin rise. D) blood levels of enterocrinin fall. E) both C and D
A
22) A structure that helps prevent food from entering the pharynx prematurely is the A) uvula. B) pharyngeal arch. C) palatoglossal arch. D) palatopharyngeal arch. E) epiglottis.
A
27) The crown of a tooth is covered by A) enamel. B) cementum. C) dentin. D) pulp. E) periodontium.
A
123) The ________ salivary glands are covered by the mucous membrane in the floor of the mouth. A) mandibular B) sublingual C) lingual D) submandibular E) parotid
B
149) In response to the hormone cholecystokinin, the pancreas secretes a fluid A) rich in enzymes. B) rich in bicarbonate. C) rich in bile. D) rich in mucus. E) that contains only amylase.
A
120) Gastrin secretion in response to elevated luminal pH is an example of A) neural stimulation. B) local stimulation. C) muscular stimulation. D) hormone stimulation. E) none of the above
B
159) Tom has hepatitis, an inflammation of the liver. Which of the following symptoms would you expect to observe in Tom? A) jaundice B) elevated levels of blood glucose C) impaired digestion of protein D) blood in the feces E) overproduction of blood plasma albumin
A
163) Identify the structure labeled ʺ12.ʺ A) fundus B) cardia C) lesser curvature D) greater curvature E) pylorus
A
168) Contraction of the muscle layer labeled ʺ9ʺ causes the digestive tract to A) constrict. B) shorten. C) dilate. D) fold for increased surface area. E) secrete enzymes.
A
22) Match the term with its activity. 1. gallbladder 2. esophagus 3. pancreas A) stores bile B) secretes digestive enzymes C) transports material to stomach
1-A; 2-C; 3-B
3) There are normally a total of ________ primary teeth.
20
125) Which of these descriptions best matches the term duodenal ampulla? A) where pancreatic juice and bile enter duodenum B) carries absorbed sugars and amino acids C) stimulates pancreas to secrete bicarbonate-rich fluid D) causes gall bladder to contract E) stimulates gastric secretion
A
4) The secondary dentition usually comprises ________ teeth.
32
2) Which of the following is an accessory organ of digestion? A) appendix B) pancreas C) spleen D) colon E) esophagus
B
39) Functions of the stomach include all of the following, except A) storage of ingested food. B) denaturation of proteins. C) initiation of protein digestion. D) absorption of triglycerides. E) mechanical breakdown of food.
D
40) Parietal cells secrete A) pepsinogen. B) gastrin. C) mucus. D) hydrochloric acid. E) enteropeptidase.
D
5) The lamina propria and mucous epithelium are components of the A) serosa. B) adventitia. C) muscularis mucosa. D) mucosa. E) submucosa.
D
142) All of the following are true of the lining of the stomach, except that it A) has a simple columnar epithelium. B) is covered by a thick, viscous mucus. C) is constantly being replaced. D) contains gastric pits. E) recycles bile.
E
144) Enterogastric reflexes A) inhibit gastric motility. B) inhibit gastric secretion. C) are triggered by chyme entering the duodenum. D) involve the enteric nervous system. E) all of the above
E
155) A drug that blocks the action of the hormone cholecystokinin would affect A) acid production by the stomach. B) the composition of pancreatic secretions. C) the delivery of bile. D) B and C only E) A, B, and C
E
14) ________ are complexes of fatty acids, monoglycerides, and bile salts.
Micelles
1) The dorsal mesentery of the fetus develops into the greater omentum of the adult.
TRUE
7) After food and gastric juices combine, the gastric contents are referred to as ________.
chyme
15) The ________ is formed by the union of the cystic duct and the common hepatic duct.
common bile duct
18) Within the oral cavity, both mechanical and chemical ________ begin
digestion
8) Bile salts aid in the digestion of fats by ________ large fat droplets.
emulsifying
62) The portion of the small intestine that attaches to the cecum is the A) haustrum. B) appendix. C) ileum. D) duodenum. E) jejunum.
C
64) An intestinal hormone that stimulates mucus secretion by the submucosal duodenal glands is A) secretin. B) cholecystokinin. C) enterocrinin. D) GIP. E) gastrin.
C
66) An intestinal hormone that stimulates the gallbladder to release bile is A) enteropeptidase. B) secretin. C) cholecystokinin. D) GIP. E) gastrin.
C
71) The fusion of the hepatic duct and the cystic duct forms the A) hepatic portal vein. B) porta hepatis. C) common bile duct. D) common pancreatic duct. E) bile canaliculus.
C
73) The exocrine portion of the pancreas is composed of A) islets of Langerhans. B) pancreatic crypts. C) pancreatic acini. D) pancreatic lobules. E) triads.
C
75) The basic functional unit of the liver is the A) hepatocyte. B) Kupffer cell. C) lobule. D) portal area. E) bile canaliculus.
C
8) The ________ are double sheets of peritoneal membrane that suspend the visceral organs and carry nerves, lymphatics, and blood vessels. A) serosa B) adventitia C) mesenteries D) fibrosa E) lamina propria
C
80) The structure that marks the division between the right and left lobes of the liver is the A) lesser omentum. B) greater omentum. C) falciform ligament. D) ligamentum teres. E) hepatic ligament.
C
82) During the cephalic phase of gastric secretion, A) the stomach responds to distention. B) secretin inhibits parietal and chief cells. C) there is an increased flow of action potentials along the vagus nerve to the stomach. D) the intestinal reflex inhibits gastric emptying. E) production of gastric juice slows down.
C
90) Approximately the last 15 cm of the digestive tract is the A) anus. B) anal canal. C) rectum. D) sigmoid colon. E) rectal column.
C
95) Movements unique to the large intestine are ________ movements. A) peristaltic B) segmentation C) mass D) pendular E) writhing
C
99) Products of fat digestion are transported initially by A) capillaries. B) veins. C) lymphatic vessels. D) the interstitial fluid. E) the arterioles.
C
112) Which of the following is classified as being either squamous or columnar? A) submucosa B) digestive epithelium C) muscularis mucosae D) lamina propria E) mucosa
B
115) The double-layer sheets of serous membrane that support the viscera are called A) peritoneal sheets. B) mesenteries. C) ascites. D) the diaphragm. E) the dorsal and ventral frenulums.
B
140) A disease that attacks and disables the myenteric plexus would A) increase intestinal motility. B) decrease intestinal motility. C) increase gastric secretion. D) decrease gastric secretion. E) interfere with both intestinal motility and gastric secretion.
B
148) In response to the hormone secretin, the pancreas secretes a fluid A) rich in enzymes. B) rich in bicarbonate ion. C) rich in bile. D) rich in mucus. E) that contains only amylase.
B
15) Which of these descriptions best matches the term submucosal plexus? A) component of mucosa B) sensory neural network C) secretes a watery fluid D) coordinates activity of muscularis externa E) loose connective tissue layer containing blood vessels
B
154) A drug that blocks the action of carbonic anhydrase in parietal cells would result in A) a lower pH during gastric digestion. B) a higher pH during gastric digestion. C) decreased production of pepsinogen by chief cells. D) increased protein digestion in the stomach. E) decreased gastrin production.
B
157) If the pancreatic duct was obstructed, you would expect to see elevated blood levels of A) bilirubin. B) amylase. C) cholecystokinin. D) secretin. E) gastrin.
B
161) What is the function of the structure labeled ʺ6ʺ? A) strains materials entering the stomach B) regulates gastric emptying C) mixes stomach juice into food D) controls contraction of stomach muscles E) prevents food from entering the esophagus
B
26) The root of a tooth is covered by A) enamel. B) cementum. C) dentin. D) pulp. E) the root canal.
B
32) The ridge of oral mucosa that surrounds the base of a tooth is the A) vestibule. B) gingiva. C) alveolus. D) uvula. E) faux.
B
43) Which region of the stomach does the esophagus connect to? A) fundus B) cardia C) body D) antrum E) pylorus
B
50) The enzyme pepsin digests A) carbohydrates. B) proteins. C) lipids. D) nucleic acids. E) vitamins.
B
52) Lacteals A) increase the surface area of the mucosa of the small intestine. B) carry absorbed fats to the lymphatic system. C) produce new cells for the mucosa of the small intestine. D) secrete digestive enzymes. E) produce milk.
B
59) Brunner glands are characteristic of the A) stomach. B) duodenum. C) jejunum. D) ileum. E) colon.
B
63) Plicae circulares are A) ridges in the wall of the stomach. B) circumferential folds in the mucosa and submucosa of the small intestine. C) fingerlike projections on the surface of the mucosa of the small intestine. D) sacculations in the colon. E) abnormal structures formed by excessive pressure in the small intestine.
B
65) The intestinal hormone that stimulates the pancreas to release a watery, bicarbonate-rich fluid is A) enterocrinin. B) secretin. C) cholecystokinin. D) GIP. E) gastrin.
B
74) Each of the following is a function of the liver, except A) synthesis and secretion of bile. B) antibody production. C) synthesis of plasma proteins. D) inactivation of toxins. E) storage of glycogen and iron reserves.
B
76) ________ are arranged within a lobule of the liver into a series of plates converging toward a central vein. A) Kupffer cells B) Hepatocytes C) Bile canaliculi D) Portal areas E) Hepatic duct
B
79) The pancreas produces ________-digesting enzymes in the form of proenzymes. A) carbohydrate B) protein C) sugar D) lipid E) nucleic acid
B
83) The gastric phase of gastric secretion is triggered by the A) sight, thought, or smell of food. B) entry of food into the stomach. C) entry of chyme into the small intestine. D) entry of chyme into the large intestine. E) release of cholecystokinin and secretin by the small intestine.
B
89) At the hepatic flexure, the colon becomes the A) ascending colon. B) transverse colon. C) descending colon. D) sigmoid colon. E) rectum.
B
92) The taenia coli are A) tears of the colon. B) longitudinal bands of smooth muscle in the colon wall. C) ridges in the mucosa of the colon. D) polyps that obstruct the sigmoid colon. E) tumors normally confined in the sigmoid colon.
B
96) The enzyme amylase digests A) peptides. B) polysaccharides. C) disaccharides. D) triglycerides. E) nucleotides.
B
117) Which layer of the digestive tract directly underlies the epithelium? A) submucosa B) digestive epithelium C) muscularis mucosae D) lamina propria E) lymphoid nodules
D
87) Nutrients are absorbed by all of the following, except A) active transport. B) diffusion. C) facilitated diffusion. D) cotransport. E) osmosis.
E
107) Which layer of the digestive tract has a dense irregular connective tissue that surrounds the muscularis mucosae? A) submucosa B) digestive epithelium C) muscularis mucosae D) lamina propria E) mucosa
A
110) Which of the following contains a remnant of the fetal umbilical vein? A) falciform ligament B) greater omentum C) mesentery proper D) lesser omentum E) diaphragm
A
12) The layer of loose connective tissue that directly supports the digestive epithelium is the A) lamina propria. B) muscularis mucosae. C) submucosa. D) submucosal plexus. E) myenteric plexus.
A
151) All of the following are true of the process known as cotransport, except that A) only neutral compounds such as sugars are transported. B) more than one molecule or ion is moved through the cell membrane at one time. C) ATP is not required by the transport protein. D) saturation phenomenon can be observed. E) molecules can be moved against a concentration gradient.
A
37) ________ are teeth with flattened crowns and prominent ridges that are adapted for crushing and grinding. A) Molars B) Cuspids C) Eye teeth D) Canines E) Dentins
A
41) Chief cells secrete A) pepsinogen. B) gastrin. C) mucus. D) hydrochloric acid. E) intrinsic factor.
A
45) The part of the stomach that functions as a mixing chamber for food and secretions is the A) body. B) antrum. C) pylorus. D) cardia. E) fundus.
A
53) Plicae and intestinal villi A) increase the surface area of the mucosa of the small intestine. B) carry products of digestion that will not pass through the walls of blood capillaries. C) produce new cells for the mucosa of the small intestine. D) secrete digestive enzymes. E) produce hormones.
A
91) Haustra are A) expansible pouches of the colon. B) strips of muscle in the colon. C) glands in the large intestine that secrete mucus. D) the source of colon hormones. E) compact feces stored in the rectum.
A
98) Carbohydrate digestion begins in the A) mouth. B) esophagus. C) stomach. D) duodenum. E) ileum.
A
104) Which of the following contains adipose tissue and provides padding for the anterior and lateral portions of the abdomen? A) falciform ligament B) greater omentum C) mesentery proper D) lesser omentum E) diaphragm
B
11) Large blood vessels and lymphatics are found in the A) mucosa. B) submucosa. C) muscularis. D) adventitia. E) serosa.
B
61) The middle segment of the small intestine is the A) ileum. B) duodenum. C) jejunum. D) pylorus. E) cecum.
C
100) The absorption of some sugars in the small intestine involves A) osmosis. B) diffusion. C) cotransport. D) phagocytosis. E) pinocytosis.
C
102) The ________ supports all but 25 cm of the small intestine and provides stability and limited movement. A) falciform ligament B) greater omentum C) mesentery proper D) lesser omentum E) diaphragm
C
103) This organ is primarily responsible for water absorption. A) small intestine B) esophagus C) large intestine D) stomach E) anus
C
135) Increased secretion by all the salivary glands results from A) sympathetic stimulation. B) hormonal stimulation. C) parasympathetic stimulation. D) myenteric reflexes. E) hunger.
C
137) At the splenic flexure, the colon becomes the A) ascending colon. B) transverse colon. C) descending colon. D) sigmoid colon. E) rectum.
C
139) During deglutition, which of the following phases is not present? A) voluntary B) pharyngeal C) laryngeal D) esophageal E) None of the above. All are phases in deglutition.
C
141) Muscles known as the pharyngeal constrictors function in A) mastication. B) moving the tongue. C) swallowing. D) esophageal peristalsis. E) opening the cardiac sphincter.
C
150) If digestion of a carbohydrate results in equal amounts of glucose and galactose, this carbohydrate is probably A) sucrose. B) maltose. C) lactose. D) cellulose. E) glycogen.
C
153) The stomach is able to distend a great deal as it receives food because of all of the following, except that A) there is a great deal of loose tissue in the form of rugae. B) the smooth muscle of the stomach is very elastic. C) the hormone gastrin relaxes stomach smooth muscle. D) sympathetic stimulation decreases the tonus of the gastric smooth muscle. E) the gastric smooth muscle is very extensible.
C
16) Waves of muscular contractions that propel the contents of the digestive tract are called A) segmentation. B) pendular movements. C) peristalsis. D) churning movements. E) mastication.
C
162) Identify the structure labeled ʺ10.ʺ A) longitudinal muscle layer B) circular muscle layer C) oblique muscle layer D) rugae E) submucosa
C
166) What is produced by the structure labeled ʺ7ʺ? A) sodium bicarbonate B) lipase C) antibodies D) hydrochloric acid E) pepsinogen
C
20) ________ pair(s) of salivary glands secrete into the oral cavity. A) One B) Two C) Three D) Four E) Six to Ten
C
49) Gastric pits are A) ridges in the body of the stomach. B) involved in absorption of liquids from the stomach. C) openings into gastric glands. D) acid scars in the esophagus. E) hollows where proteins are stored.
C
55) The duodenal ampulla receives secretions from the A) duodenum and the jejunum. B) duodenum and the pylorus. C) common bile duct and the pancreatic duct. D) duodenum and the pancreatic duct. E) duodenum and the bile duct.
C
56) The villi are most developed in the A) stomach. B) duodenum. C) jejunum. D) gall bladder. E) cecum.
C
136) The secretion of acid and enzymes by the gastric mucosa is controlled and regulated by A) the central nervous system. B) short reflexes coordinated in the stomach wall. C) digestive tract hormones. D) A, B, and C E) A and C only
D
147) A blockage of the ducts from the parotid glands would A) reduce delivery of saliva. B) cause mumps-like swelling of the face. C) interfere with carbohydrate digestion in the mouth. D) A, B, and C E) B and C only
D
152) Parietal cells secrete A) pepsinogen. B) gastrin. C) mucus. D) intrinsic factor. E) vitamin B12.
D
156) An obstruction of the common bile duct often results in A) undigested fat in the feces. B) jaundice. C) inability to digest protein. D) A and B only E) A, B, and C
D
160) Tony is a chronic alcoholic with cirrhosis of the liver, a condition in which liver cells die and are replaced by connective tissue. Which of the following signs would you expect to observe in Tony? A) increased clotting time B) jaundice C) portal hypertension and ascites D) all of the above E) B and C only
D
167) Which structure controls the contraction of the muscularis externa? A) 2 B) 8 C) 9 D) 10 E) 11
D
169) What type of epithelium covers the structure labeled ʺ6ʺ? A) simple squamous B) stratified squamous C) simple cuboidal D) simple columnar E) pseudostratified ciliated columnar
D
19) The functions of the oral cavity include all of the following, except A) analysis of material before swallowing. B) mechanical processing of food. C) lubrication. D) absorption of monosaccharides. E) digestion of carbohydrates.
D
25) The chamber within a tooth that contains blood vessels and nerves is the A) enamel. B) cementum. C) dentin. D) pulp cavity. E) periodontium.
D
28) During deglutition, A) the soft palate elevates. B) the larynx elevates and the epiglottis closes. C) the lower esophageal sphincter opens. D) all of the above E) A and C only
D
3) Digestion refers to the A) progressive dehydration of indigestible residue. B) mechanical breakdown of food. C) chemical breakdown of food. D) B and C only E) A, B, and C
D
31) The space between the cheeks or lips and the teeth is called the A) pharynx. B) larynx. C) fauces. D) vestibule. E) dip sulcus.
D
34) The uvula is located at the A) posterior of the tongue. B) margin of the vestibule. C) base of a tooth. D) posterior margin of the soft palate. E) margin of the oropharynx and the laryngopharynx.
D
36) ________ are pointed teeth that are adapted for tearing and slashing. A) Incisors B) Bicuspids C) Premolars D) Cuspids E) Molars
D
38) The esophagus has several variations from the standard plan of the gut tube. These include A) epithelium of mucosa is stratified squamous. B) epithelium of mucosa is simple columnar. C) muscularis externa may be striated muscle. D) A and C only E) B and C only
D
48) The greater omentum is A) the entrance to the stomach. B) attached to the stomach at the lesser curvature. C) important in the digestion of fats. D) a fatty sheet that hangs like an apron over the abdominal viscera. E) a sheet of mesentery that attaches to the liver.
D
51) An enzyme secreted by the gastric mucosa of a newborn that coagulates milk proteins is A) pepsin. B) trypsin. C) gastrin. D) rennin. E) cholecystokinin.
D
6) Which of these descriptions best matches the term myenteric plexus? A) component of mucosa B) sensory neural network C) secretes a watery fluid D) coordinates activity of muscularis externa E) loose connective tissue layer containing blood vessels
D
68) An intestinal hormone that stimulates gastric secretion is A) secretin. B) cholecystokinin. C) enteropeptidase. D) gastrin. E) gastric inhibitory peptide (GIP).
D
7) Contraction of the ________ alters the shape of the intestinal lumen and moves epithelial pleats and folds. A) mucosa B) submucosa C) submucosal plexus D) muscularis mucosa E) adventitia
D
70) The human liver is composed of ________ lobe(s). A) one B) two C) three D) four E) two large, four small
D
72) In the center of a liver lobule there is a A) hepatic duct. B) portal area. C) sinusoid. D) central vein. E) portal vein.
D
78) The pancreas produces A) lipases and amylase. B) nucleases. C) peptidases and proteinases. D) all of the above E) A and C only
D
81) Bile is stored in the A) liver. B) duodenum. C) pancreas. D) gallbladder. E) appendix.
D
9) Sensory nerve cells, parasympathetic ganglia, and sympathetic postganglionic fibers can be found in the A) mucosa. B) serosa. C) adventitia. D) submucosal plexus. E) lamina propria.
D
94) A small, wormlike structure attached to the posteromedial surface of the cecum is the A) haustra. B) pancreas. C) gallbladder. D) appendix. E) ileum.
D
109) The serous membrane that lines the peritoneal cavity A) secretes peritoneal fluid. B) decreases friction. C) lubricates the cavity. D) prevents irritation. E) all of the above
E
113) Approximately ________ liters of fluid are secreted and reabsorbed into the digestive system each day. A) 5 B) 10 C) 2 D) 1 E) 7
E
114) Identify the salivary gland that secretes a watery mixture rich in salivary amylase and bicarbonate ion. A) mandibular B) sublingual C) lingual D) submandibular E) parotid
E
121) ________ are also known as canines. A) Bicuspids B) Incisors C) Molars D) Secondary teeth E) Cuspids
E
124) Which of these statements about the tongue is false? A) dorsal surface covered with papillae B) composed of large extrinsic and small intrinsic muscles C) lingual frenulum attaches ventral surface to floor of oral cavity D) secretes lingual lipase E) secretes salivary amylase
E
126) Which of the following is a function of the tongue? A) manipulation to assist with chewing B) mechanical processing C) sensory analysis D) secretion of mucins E) all of the above
E
127) Which salivary gland produces a serous secretion containing large amounts of salivary amylase? A) mandibular B) sublingual C) lingual D) submandibular E) parotid
E
128) Absorption of glucose from the gut lumen depends on A) the sodium-potassium pump in the basolateral membrane of the epithelial cell. B) cotransporter proteins in the apical membrane of the epithelial cell. C) higher sodium ion concentration in the lumen than in the epithelial cell. D) A and B only E) A, B, and C
E
129) Functions of teeth include A) tearing. B) crushing. C) cutting. D) clipping. E) all of the above
E
130) ________ crush and grind food. A) Bicuspids B) Incisors C) Molars D) Cuspids E) both A and C
E
14) A feature of the digestive epithelium that assists expansion of the organ is the presence of A) transitional cells. B) plicae. C) elastic cells. D) rugae. E) both B and D
E
164) Which structure helps the stomach to stretch as it fills with food? A) 3 B) 4 C) 5 D) 6 E) 9
E
165) Identify the structure labeled ʺ7.ʺ A) esophagus B) cardia C) lesser curvature D) greater curvature E) pylorus
E
17) Powerful peristaltic contractions that occur a few times each day in the colon are called A) segmentation. B) pendular movements. C) haustral churning. D) defecation. E) mass movements.
E
18) The activities of the digestive system are regulated by A) hormones. B) parasympathetic and sympathetic neurons. C) the contents of the digestive tract. D) intrinsic nerve plexuses. E) all of the above
E
23) Functions of the tongue include all of the following, except A) mechanical processing of food. B) manipulation of food. C) sensory analysis of food. D) aiding in speech. E) partitioning the oropharynx from the nasopharynx.
E
29) Which of the following is false about secretions from the salivary glands? A) are mostly water B) help control bacterial populations in the mouth C) help lubricate the oral cavity and its contents D) contain enzymes for the digestion of polysaccharides E) contain enzymes for the digestion of disaccharides
E
30) The roof of the oral cavity is formed by the A) vestibule. B) hard palate. C) soft palate. D) A, B, and C E) B and C only
E
4) Which of the following is not a function of the digestive system? A) mechanical processing B) absorption C) compaction D) ingestion E) filtration
E
46) The region of the stomach that empties into the duodenum is the A) antrum. B) fundus. C) body. D) cardia. E) pylorus.
E
58) Which of these enhance the absorptive effectiveness of the small intestine? A) the plicae circulares B) the villi C) the microvilli D) intestinal movements E) all of the above
E
60) The pylorus empties into the A) ileum. B) colon. C) cecum. D) jejunum. E) duodenum
E
67) An intestinal hormone that stimulates the release of insulin from the pancreatic islet cells is A) enterocrinin. B) enteropeptidase. C) secretin. D) cholecystokinin. E) gastric inhibitory peptide (GIP).
E
69) Which of these descriptions best matches the term gastrin? A) where pancreatic juice and bile enter duodenum B) carries absorbed sugars and amino acids C) stimulates pancreas to secrete bicarbonate-rich fluid D) causes gall bladder to contract E) stimulates gastric secretion
E
77) The Kupffer cells of the liver A) destroy RBCs. B) destroy bacteria. C) present antigens. D) are phagocytic. E) all of the above
E
2) Dentin is the hardest substance found in teeth.
FALSE
9) ________ is gas produced by bacteria in the colon as they metabolize indigestible carbohydrates.
Flatus
12) Sucrose is hydrolyzed by sucrase into glucose and ________.
fructose
17) The circumferential folds that encircle the digestive tract are known as ________.
plicae
20) The dangling process that aids in keeping food out of the nasopharynx is known as the ________.
uvula
