1.
|
The correct sequence for the layers
within the walls of the alimentary canal from inside to outside is the
|
A)
|
mucous membrane, muscular layer, serous
layer, submucosa.
|
B)
|
mucous membrane, submucosa, muscular
layer, serous layer.
|
C)
|
serous layer, muscular layer, mucous
membrane, submucosa.
|
D)
|
submucosa, mucous membrane, serous
layer, muscular layer.
|
2.
|
The teeth that are best adapted for
biting off relatively large pieces of food are the
|
A)
|
|
B)
|
cuspids.
|
C)
|
bicuspids.
|
D)
|
molars.
|
3.
|
The salivary enzyme amylase functions
to digest
|
A)
|
carbohydrates.
|
B)
|
proteins.
|
C)
|
fats.
|
D)
|
all of the above
|
4.
|
The main part of the stomach is called
the
|
A)
|
fundic region.
|
B)
|
pyloric region.
|
C)
|
cardiac region.
|
D)
|
none of the above
|
5.
|
A relatively new treatment in the
management of gastric ulcers is a drug that inhibits the production of HCl in
the stomach. If a person took this medication for a long period, the
digestion of which of the following would be affected the most?
|
A)
|
carbohydrates
|
B)
|
lipids
|
C)
|
proteins
|
D)
|
none of the above
|
6.
|
Gastrin, which is secreted by stomach
cells, functions to
|
A)
|
inhibit the production of hydrochloric
acid.
|
B)
|
increase the secretions of the gastric
glands.
|
C)
|
change pepsin into pepsinogen.
|
D)
|
initiate the cephalic phase of
digestion.
|
7.
|
The hormone called secretin functions
to
|
A)
|
convert trypsinogen into trypsin.
|
B)
|
activate chymotrypsin.
|
C)
|
stimulate the release of pancreatic
juice.
|
D)
|
inhibit the action of pancreatic
lipase.
|
8.
|
Which of the following is a
protein-splitting enzyme found in pancreatic juice?
|
A)
|
trypsin
|
B)
|
zymogen
|
C)
|
amylase
|
D)
|
nuclease
|
9.
|
What constituent of bile has a
digestive function?
|
A)
|
bile salts
|
B)
|
bile pigments
|
C)
|
cholesterol
|
D)
|
electrolytes
|
10.
|
One of the major functions of the large
intestine is to
|
A)
|
secrete digestive enzymes.
|
B)
|
reabsorb water from chyme.
|
C)
|
regulate the release of bile.
|
D)
|
break down hemoglobin.
|
11.
|
A characteristic shared by all enzymes
involved in protein digestion is that all are
|
A)
|
secreted by the pancreas.
|
B)
|
activated by HCl.
|
C)
|
secreted in an inactive form.
|
D)
|
stimulated by enterokinase.
|
12.
|
Peristalsis occurs in the digestive
tract
|
A)
|
from the pharynx to the anus.
|
B)
|
in the stomach and small intestine
only.
|
C)
|
in the small and large intestines only.
|
D)
|
in the stomach, small intestine, and
large intestine.
|
13.
|
Digestion of which of the following
would be affected the most if the liver were severely damaged?
|
A)
|
carbohydrates
|
B)
|
lipids
|
C)
|
proteins
|
D)
|
none of the above
|
14.
|
A hiatal hernia is due to a weakness of
the
|
A)
|
abdominal wall.
|
B)
|
pelvic wall.
|
C)
|
diaphragm.
|
D)
|
stomach wall.
|
15.
|
Heartburn is usually caused by the effects
of gastric juice on the
|
A)
|
heart.
|
B)
|
esophagus.
|
C)
|
stomach.
|
D)
|
small intestine.
|
16.
|
Gastric and duodenal ulcers are usually
caused by the action of
|
A)
|
pepsin.
|
B)
|
lipase.
|
C)
|
amylase.
|
D)
|
none of the above
|
17.
|
The greater omentum is composed of the
|
A)
|
peritoneal membrane.
|
B)
|
pericardial membrane.
|
C)
|
pleural membrane.
|
D)
|
none of the above
|
18.
|
The digestive functions of saliva
include
|
A)
|
digesting starch into disaccharides.
|
B)
|
acting as a lubricant during
swallowing.
|
C)
|
dissolving food chemicals.
|
D)
|
all of the above
|
19.
|
When nutrients are digested but are not
taken in by the intestinal tissues, the condition is called
|
A)
|
malnutrition.
|
B)
|
malabsorption.
|
C)
|
food intolerance.
|
D)
|
food allergy.
|
20.
|
If the blood vessels of the anal
columns become enlarged, the condition is called
|
A)
|
peritonitis.
|
B)
|
hemorrhoids.
|
C)
|
diarrhea.
|
D)
|
none of the above
|
21.
|
Which layer of the alimentary canal is
responsible for absorption of nutrients?
|
A)
|
mucosa
|
B)
|
submucosa
|
C)
|
muscular layer
|
D)
|
serosa
|
22.
|
The mechanism of swallowing involves
|
A)
|
food being forced into the pharynx.
|
B)
|
involuntary reflexes moving food into
the esophagus.
|
C)
|
peristaltic contractions moving food
through the esophagus.
|
D)
|
all of the above
|
23.
|
Which of the following are major
functions of the liver?
|
A)
|
storage of certain molecules
|
B)
|
blood filtering
|
C)
|
secretion of bile
|
D)
|
all of the above
|
24.
|
Gallstones may form if
|
A)
|
bile is concentrated excessively.
|
B)
|
hepatic cells secrete too much HCl.
|
C)
|
the pH of the gallbladder becomes too
alkaline.
|
D)
|
all of the above
|
Answer
Key
1.
|
B
|
2.
|
A
|
3.
|
A
|
4.
|
D
|
5.
|
C
|
6.
|
B
|
7.
|
C
|
8.
|
A
|
9.
|
A
|
10.
|
B
|
11.
|
C
|
12.
|
A
|
13.
|
B
|
14.
|
C
|
15.
|
B
|
16.
|
A
|
17.
|
A
|
18.
|
D
|
19.
|
B
|
20.
|
B
|
21.
|
A
|
22.
|
D
|
23.
|
D
|
24.
|
A
|
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