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MICRO > Test 4: Chapter 24 Digestive System > Flashcards

Test 4: Chapter 24 Digestive System Flashcards

1
Q

Which layer of the digestive tract is in direct contact with the food that is consumed?

  1. mucosa
  2. muscularis
  3. serosa
  4. submucosa
A
  1. mucosa
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2
Q

The ENS is found in

  1. the submucosa layer
  2. the muscularis layer
  3. the serosa layer
  4. both a and b are correct
  5. all of these are correct
A
  1. both a and b are correct
  2. the submucosa layer
  3. the muscularis laye
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3
Q

Dentin

  1. forms the surface of the crown of the teeth
  2. holds the teeth to the periodontal ligaments
  3. is found in the pulp cavity
  4. makes up more of the structure of the teeth
  5. is harder than enamel
A
  1. makes up more of the structure of the teeth
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4
Q

The number of premolar deciduous teeth is

  1. 0
  2. 2
  3. 4
  4. 8
  5. 12
A
  1. 0
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5
Q

Which of these glands does not secrete saliva into the oral cavity?

  1. submandibular gland
  2. pancreas
  3. sublingual gland
  4. parotid gland
A
  1. pancreas
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6
Q

The portion of the digestive tract in which digestion begins is the

  1. oral cavity
  2. esophagus
  3. stomach
  4. duodenum
  5. jejunum
A
  1. oral cavity
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7
Q

During swallowing

  1. the movement of food results primarily from gravity
  2. the swallowing center in the medulla oblongata is activated
  3. food is pushed into the oropharynx during the pharyngeal phase
  4. the soft palate closes off the opening into the larynx
A
  1. the swallowing center in the medulla oblongata is activated
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8
Q

The stomach

  1. has large folds in the submucosa and mucosa called rugae
  2. has 2 layers of smooth muscle in the muscularis tunic
  3. opening from the esophagus is the pyloric opening
  4. has an area closest to the duodenum called the fundus
  5. all of these are correct
A
  1. has large folds in the submucosa and mucosa called rugae
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9
Q

Which of these stomach cell types in NOT correctly matched with its function?

  1. surface mucous cells - produce mucus
  2. parietal cells - produce hydrochloric acid
  3. chief cells - produce intrinsic factor
  4. endocrine cells - produce regulatory hormones
A
  1. chief cells - produce intrinsic factor
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10
Q

Why doesn’t the stomach digest itself?

  1. the stomach wall is not composed of protein, so it is not affected by proteolytic enzyme
  2. the digestive enzymes of the stomach are not strong enough to digest the stomach wall
  3. the lining of the stomach wall has a protective layer of epithelial cells
  4. the stomach wall is protected by large amounts of mucus
A
  1. the stomach wall is protected by large amounts of mucus
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11
Q

Which of these hormones stimulates stomach secretions?

  1. cholecystokinin
  2. insulin
  3. gastrin
  4. secretion
A
  1. gastrin
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12
Q

Which of these structures increase the mucosal surface of the small intestine?

  1. circular folds
  2. villi
  3. microvilli
  4. length of the small intestine
  5. all of these are correct
A
  1. all of these are correct
  2. circular folds
  3. villi
  4. microvilli
  5. length of the small intestine
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13
Q

Which cells in the small intestine have digestive enzymes attached to their surface?

  1. mucous cells
  2. goblet cells
  3. endocrine cells
  4. absorptive cells
A
  1. absorptive cells
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14
Q

The hepatic sinusoids

  1. receive blood from the hepatic artery
  2. receive blood from the hepatic portal vein
  3. empty into the central veins
  4. all of these are correct
A
  1. all of these are correct
  2. receive blood from the hepatic artery
  3. receive blood from the hepatic portal vein
  4. empty into the central veins4
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15
Q

Which of the following might occur if a person suffers from a severe case of hepatitis that impairs liver function?

  1. lipid digestion is difficult
  2. by-products of hemoglobin breakdown accumulate in the blood
  3. plasma proteins decrease in concentration
  4. toxins in the blood increase
  5. all of these occur
A
  1. all of these occur
  2. lipid digestion is difficult
  3. by-products of hemoglobin breakdown accumulate in the blood
  4. plasma proteins decrease in concentration
  5. toxins in the blood increase
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16
Q

The gallbladder

  1. produces bile
  2. stores bile
  3. contracts and releases bile in response to secretin
  4. contracts and releases bile in response to sympathetic stimulation
  5. both 2 and 3 are correct
A
  1. stores bile
17
Q

The aqueous component of pancreatic secretions

  1. is secreted by the pancreatic islets
  2. contains HCO-3
  3. is released primarily in response to cholecystokinin
  4. passes directly into the blood
  5. all of these are correct
A
  1. contains HCO-3
18
Q

Which of these is NOT a function of the large intestine

  1. absorption of glucose
  2. absorption of certain vitamins
  3. absorption of water and salts
  4. production of mucus
A
  1. absorption of glucose
19
Q

Defecation

  1. can be initiated by stretch of the rectum
  2. can occur as a result of mass movements
  3. involves local reflexes
  4. involves parasympathetic reflexes mediated by the spinal cord
  5. all of these characteristics are true of defecation
A
  1. all of these characteristics are true of defacation
  2. can be initiated by stretch of the rectum
  3. can occur as a result of mass movements
  4. involves local reflexes
  5. involves parasympathetic reflexes mediated by the spinal cord
20
Q

Which of these structures produces enzymes that digest carbohydrates?

  1. salivary glands
  2. pancreas
  3. lining of small intestine
  4. both 1 and 2 are correct
  5. all of these are correct
A
  1. all of these are correct
  2. salivary glands
  3. pancreas
  4. lining of small intestine
  5. both 1 and 2 are correct
21
Q

Bile

  1. is an important enzyme for the digestion of lipids
  2. is made by the gallbladder
  3. contains breakdown products from hemoglobin
  4. emulsifies lipids
  5. both 3 and 4 are correct
A
  1. both 3 and 4 are correct
  2. contains breakdown products from hemoglobin
  3. emulsifies lipids
22
Q

Micelles are

  1. lipids surrounded by bile salts
  2. produced by the pancreas
  3. released into lacteals
  4. stored in the gallbladder
  5. reabsorbed in the colon
A
  1. lipids surrounded by bile salts
23
Q

If the thoracic duct were tied off, which of these classes of nutrients would NOT enter the circulatory system at their normal rate?

  1. amino acids
  2. glucose
  3. lipids
  4. fructose
  5. nucleotides
A
  1. lipids
24
Q

Which of these lipoprotein molecules transports excess lipids from cells back to the liver?

  1. high density lipoprotein (HDL)
  2. low density lipoprotien (LDL)
  3. very low density lipoprotein (VLDL)
A
  1. high density lipoprotein (HDL)

MICRO (13 decks)

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