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31 Cards in this Set
- Front
- Back
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Which is the primary absorptive organ of the digestive system?
A) small intestine B) stomach C) colon D) pancreas |
A) small intestine
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Which tissue layer provides for primary digestive motility?
A) mucosa B) submucosa C) mesentery D) muscularis mucosa |
D) muscularis mucosa
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During swallowing...
A) all processes are consciously controlled B) the swallowing center located in the medulla oblongata inhibits the medullary respiratory center C) the vocal folds are relaxed D) the food bolus is forced down the esophagus by gravity |
B) the swallowing center located in the medulla oblongata inhibits the medullary respiratory center
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Proteins are primarily digested to and absorbed as...
A) amino acids B) monosaccharides C) nucleic acids D) fatty acids & glycerol |
A) amino acids
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Which of the following is an active proteolytic enzyme?
A) pepsinogen B) secretin C) procarboxypeptidase D) none of the above |
D) none of the above
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Gastric emptying is primarily controlled by...
A) the neuronal signals emanating from the medullary swallowing center B) the volume of chyme in the stomach C) conditions/factors in the duodenum D) the degree of fluidity of the chyme in the stomach |
C) conditions/factors in the duodenum
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Bile is produced by the liver continuously. (Which of the following is true?)
A) bile functions to catalyze digestive processes in a manner similar to enzymes B) bile salts emulsify large droplets of triglycerides C) bile salts reduce the surface area of droplets of triglycerides D) 95% of bile salts are lost in the feces |
B) bile salts emulsify large droplets of triglycerides
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HCl secretion by the stomach...
A) is triggered by chewing B) denatures proteins C) activates enzymes that digest proteins D) all of these |
D) all of these
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What prevents food from entering the nasal passages during swallowing?
A) elevation of uvula B) contraction of pharyngeal muscles C) apposition of vocal folds D) elevation of epiglottis |
A) elevation of uvula
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The serosa is...
A) abdominal cavity containing the stomach inner lining of the digestive tract B) outer connective tissue covering of the digestive tract C) layer of smooth muscle of the digestive tract D) |
B) outer connective tissue covering of the digestive tract
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Some absorption occurs in the large intestine, but this is mostly limited to...
A) amino acids B) water & electrolytes C) fatty acids D) buffers and mucous secreted by the large intestinal mucosa |
B) water & electrolytes
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Peristaltic antral contractions...
A) occur at the rate of 3 per minute B) are responsible for gastric emptying C) are responsible for mixing food and gastric enzymes within the antrum D) all of these |
D) all of these
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Which of the following factors will not influence the rate of gastric emptying?
A) fat in the duodenum B) acid in the duodenum C) caffeine in the duodenum D) distension of the duodenum |
C) caffeine in the duodenum
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The major chemical digestive activity that takes place in the stomach is...
A) breakdown of starch B) breakdown of proteins C) digestion of fats D) neutralization of acid by buffers & mucous |
B) breakdown of proteins
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Bile acts on...
A) distention in the stomach B) acid in the stomach C) fat in the stomach D) fat in the duodenum |
D) fat in the duodenum
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Chief cells of gastric mucosa secrete...
A) trypsin B) bicarbonate ions C) pepsinogen D) HCl |
C) pepsinogen
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Which of the following organs secrete mucus?
A) salivary glands B) colon C) stomach D) all of the above |
D) all of the above
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Stomach acid is neutralized...
A) in the duodenum B) by secretions secreted by antrum C) in the duodenum with trypsin D) with trypsin |
A) in the duodenum
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Which of the following does not enter the duodenal lumen?
A) chyme from stomach B) bile salts C) disaccharidases D) pancreatic enzymes |
C) disaccharidases
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Which of the following is true about pancreatic secretions?
A) CCK causes release of bicarbonate B) secretin causes release of enzymes C) gastrin stimulates release of enzymes D) CCK stimulates release of enzymes while secretin stimulates release of bicarbonate |
D) CCK stimulates release of enzymes while secretin stimulates release of bicarbonate
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Which of the following is absorbed by the gastric mucosa?
A) glucose B) caffeine C) aspirin D) HCl |
C) aspirin
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Venous blood flows into the liver via...
A) hepatic vein B) hepatic portal system C) sinusoids D) canaliculi |
B) hepatic portal system
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Which is not a brush border enzyme?
A) lipase B) enteropeptidase C) sucrase D) aminopeptidase |
A) lipase
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Lipids...
A) are broken down by pepsin B) are absorbed into lacteals C) become part of micelles in the duodenum D) two of the above |
D) two of the above [B&C]
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Distension of the stomach...
A) causes glucose absorption B) results in salivation C) triggers gastrocolic reflex D) inhibits gastric emptying |
C) triggers gastrocolic reflex
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The intrinsic nerve plexuses...
A) are located in the mucosal region B) network of neurons that act as "gut" brain C) are made up of two plexuses D) two of the above |
D) two of the above [B&C]
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The ileocecal sphincter...
A) prevents acid from entering the esophagus B) prevents bacterial growth in the stomach C) prevents bacterial infection of small intestine D) inhibits gastric emptying |
C) prevents bacterial infection of small intestine
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Intrinsic factor is...
A) secreted by parietal cells and is responsible for vitamin B12 absorption B) not necessary for normal body function C) abundant in pernicious anemia D) an aminopeptidase |
A) secreted by parietal cells and is responsible for vitamin B12 absorption
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Bile salts...
A) emulsify proteins B) are formed from cholesterol C) are acidic in nature D) are needed for carbohydrate digestion |
B) are formed from cholesterol
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The hormone that inhibit gastric secretion and motility is...
A) gastrin B) histamine C) secretin D) cholecytokinin |
C) secretin
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Dimished salivary secretion that leads to difficulty in chewing and swallowing is due to a condition called...
A) malocclusion B) temporomandibular joint dysfunction C) dental caries D) xerostomia |
D) xerostomia
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