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1
Which of the following digestive system organs is an accessory organ?
A)mouth
B)stomach
C)pancreas
D)small intestine
2
The function of the projections of the mucosa of the GI tract is to
A)increase its secretory capacity
B)protect the surface of the inner wall
C)enlarge the area available for absorption
D)decrease the effects of peristalsis
3
The vessels that nourish the tissues of the alimentary canal and carry away absorbed materials are found in the
A)mucosa
B)submucosa
C)muscular layer
D)serosa
4
The layer of the wall of the alimentary canal which keeps the outer surface of the alimentary canal moist and slippery is the
A)mucosa
B)submucosa
C)muscular layer
D)serosa
5
The major change to food that occurs in the mouth is
A)mechanically reducing the size of solid particles
B)beginning the separation of fats from proteins
C)beginning the chemical changes needed to produce nutrients in a form that can be absorbed
D)allowing the taste of the food to be savored
6
The functions of the tongue include
A)mixing food particles with saliva
B)moving food toward the palate
C)both
D)neither
7
During swallowing, muscles draw the soft palate and uvula upward to
A)move food into the esophagus
B)enlarge the area to accommodate a bolus of food
C)separate the oral and nasal cavities
D)move the uvula from the path of the food bolus
8
The teeth that grasp and tear food are the
A)incisors
B)cuspids
C)bicuspids
D)molars
9
Good dental hygiene is essential because
A)dental problems can lead to infection.
B)once damaged, enamel cannot be replaced
C)both
D)neither
10
Which of the following is not a function of saliva?
A)cleanse the mouth and teeth
B)dissolve chemicals necessary to tasting food
C)help in formation of food bolus
D)begin digestion of protein
11
When a bolus of food reaches the end of the esophagus, the lower esophageal sphincter relaxes in response to
A)the weight of the bolus of food
B)nerve impulses conducted by the sympathetic division
C)nerve impulses conducted by the parasympathetic division
D)arrival of peristaltic waves
12
The area of the stomach that acts as a temporary storage area for ingested food is the
A)cardiac region
B)fundic region
C)body region
D)pyloric region
13
The chief cells of the gastric glands secrete
A)mucus
B)hydrochloric acid
C)digestive enzymes
D)potassium chloride
14
The digestive enzyme pepsin, secreted by gastric glands, begins the digestion of
A)carbohydrates
B)protein
C)both
D)neither
15
The release of gastrin is stimulated mainly by the
A)parasympathetic nervous system
B)presence of alkaline substances
C)sight and smell of food
D)presence of substances such as carbohydrates and caffeine in the stomach
16
The foods that stay longest in the stomach are
A)protein foods
B)fatty foods
C)complex carbohydrate foods
D)simple sugar foods
17
Pancreatic enzymes travel along the pancreatic duct and, along with the bile duct, join the alimentary canal at the
A)duodenum
B)jejunum
C)ileum
D)pylorus
18
Which of the following enzymes is present in the mouth and pancreas?
A)amylase
B)lipase
C)trypsin
D)lactase
19
Which of the following liver functions does not concern protein metabolism?
A)deaminating amino acids
B)forming urea
C)forming bile
D)synthesizing clotting factors
20
Which of the following substances is (are) not usually stored in the liver?
A)vitamins A and D
B)carbohydrate
C)iron
D)water soluble vitamins
21
Type A hepatitis is transmitted by
A)ingestion of food contaminated by feces
B)transfusion with blood contaminated by the hepatitis virus
C)use of improperly cleaned needles
D)sexual activity
22
The function of the gallbladder is to
A)store and release bile
B)produce bile
C)activate bile
D)modify the pH of bile
23
Which of the following is a function of bile?
A)emulsification of fats
B)absorption of fats
C)increase the solubility of amino acids
D)absorption of water soluble vitamins
24
The velvety appearance of the lining of the small intestine is due to the presence of
A)cilia
B)villi
C)mucus secreted by the small intestine
D)capillaries
25
Glands within the small intestine produce enzymes that break down
A)peptides
B)disaccharides
C)both
D)neither
26
Which of the following nutrients are absorbed by the lacteals of the villi of the small intestine?
A)peptides
B)fats
C)amino acids
D)glucose
27
All of the following nutrients enter blood capillaries via intestinal villi except
A)amino acids
B)monosaccharides
C)all fatty acids
D)electrolytes
28
The internal and external anal sphincters close the
A)Sigmoid colon
B)rectum
C)anal canal
D)anus
29
Which of the following nutrients is not absorbed by the intestine?
A)fructose
B)galactose
C)glucose
D)cellulose
30
The carbohydrate form most commonly oxidized by cells as fuel is
A)fructose
B)lactose
C)glucose
D)galactose
31
Which of the following is a water-soluble vitamin?
A)A
B)C
C)D
D)E
32
Digestion is the mechanical and chemical breakdown of foods into nutrients that cell membranes can absorb.
A)True
B)False
33
While various regions of the alimentary canal are specialized to carry out certain functions, the structure of its wall and its innervation is similar throughout its length.
A)True
B)False
34
The lips contain both smooth and skeletal muscle as well as receptors for temperature and pain.
A)True
B)False
35
Skeletal muscle makes up most of the bulk of the tongue.
A)True
B)False
36
The hard and soft palate form the roof of the oral cavity.
A)True
B)False
37
There are 32 teeth in both the primary and secondary sets of teeth.
A)True
B)False
38
The only secretion of the salivary glands is the digestive enzyme amylase.
A)True
B)False
39
The three phases of swallowing are controlled by the somatic nervous system.
A)True
B)False
40
Mucous cells of the gastric glands secrete a thick alkaline substance that coats the lining of the stomach and prevents its digestion by pepsin and hydrochloric acid.
A)True
B)False
41
Parietal cells produce and secrete hydrochloric acid (HCl).
A)True
B)False





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