Download Digestion LG 09

Name _______________________________________ hr ___
At each arrow explain what is happening & note all the enzymes & other miscellaneous chemicals involved
1. Digestion is the
a. churning of food in the stomach and intestine.
b. absorption of nutrients.
c. conversion of glycogen to glucose.
d. conversion of amino acids to proteins.
e. chemical and mechanical breakdown of food.
2. An alimentary canal is best defined as
a. a tube-shaped digestive compartment with either
one or two openings.
b. a tube-shaped digestive compartment that has two
openings and through which food moves in one
direction.
c. a digestive cavity in which food is churned and
mixed.
d. the compartment in which an animal digests its
food.
e. a tubelike digestive compartment that has two
openings and consists, at minimum, of a mouth,
esophagus, stomach, intestine, and anus.
3. The epithelial cells lining the intestine have surface
projections that increase the area for absorption. These
projections are called
a. rugae.
d. cilia
b. flagella.
e. villi
c. microvilli.
4. Which of the following correctly lists the order of the
organs of the human digestive system?
a. esophagus, pharynx, stomach, large intestine, small
intestine
b. pharynx, oral cavity, esophagus, stomach, large
intestine
c. oral cavity, esophagus, stomach, large intestine,
small intestine
d. oral cavity, pharynx, esophagus, stomach, small
intestine, large intestine
e. esophagus, pharynx, stomach, small intestine, large
intestine
5. Smooth muscle propels food through the alimentary canal
by a process called
a. diffusion.
b. progurgitation.
c. peristalsis.
d. active transport.
e. circular contractions.
6. Human saliva performs all of the following functions
except
a. neutralizing food acids.
b. controlling bacterial populations.
c. lubricating food.
d. hydrolyzing starch.
e. hydrolyzing proteins.
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7. What is the epiglottis?
a. a muscle sphincter that closes off the entry to the
trachea during swallowing
b. a muscle that moves the esophagus into line with the
pharynx during swallowing
c. a muscle that moves the trachea out of line with the
pharynx during swallowing
d. a flap of cartilage that flips down to cover the entry
to the trachea during swallowing
e. a flap of skin that covers the entry to the trachea
except during breathing
8. The parietal cells of the stomach's gastric glands secrete
a. lactic acid.
b. pepsinogen.
c. pepsin.
d. hydrochloric acid.
e. mucus.
9. The function of the pyloric sphincter is to
a. release pancreatic secretions into the duodenum
when chyme is present.
b. release bile into the duodenum when chyme is
present.
c. release bile and pancreatic secretions into the
duodenum when chyme is present.
d. release acid chyme into the duodenum in periodic
squirts.
e. retain acid chyme in the stomach until pepsin
digestion is complete.
10. Most nutrient absorption occurs in which part of the
digestive system?
a. pancreas
b. large intestine
c. liver
d. stomach
e. small intestine
11. What is the main digestive function of the pancreas?
a. It produces digestive enzymes and bile salts.
b. It produces bicarbonate-containing mucus.
c. It produces digestive enzymes and a solution rich in
bicarbonate.
d. It aids in the control of cholesterol.
e. It produces bile.
12. Which of the following nutrients does not begin
undergoing digestion until it reaches the small intestine?
a. fat
d. polypeptide
b. protein
e. starch
c. complex carbohydrate
13. Absorption of water is one major function of which of the
following structures?
a. colon
d. cecum
b. rectum
e. appendix
c. esophagus
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