NSG 3160; EXAM
CH. 21: THE DIGESTIVE SYSTEM
1) Digestion refers to the
A) progressive dehydration of indigestible residue.
B) input of food into the digestive tract.
C) release of substances into the lumen of the gut.
D) absorption of nutrients in the gut.
E) breakdown of food into particles small enough to cross epithelial cells. - CORRECT
ANSWER -E
2) Secretion refers to the
A) progressive dehydration of indigestible residue.
B) input of food into the digestive tract.
C) release of substances into the lumen of the gut.
D) absorption of nutrients in the gut.
E) breakdown of food into particles small enough to cross epithelial cells. - CORRECT
ANSWER -C
3) Identify the answer choice that lists the GI functions that are most closely regulated by
the body.
A) absorption and motility
B) digestion and motility
C) secretion and digestion
D) motility and secretion
E) motility, secretion, and digestion - CORRECT ANSWER -D
4) Which of the following is an accessory organ of digestion?
,A) stomach
B) pancreas
C) spleen
D) colon
E) esophagus - CORRECT ANSWER -B
5) The ________ is a significant site of absorption of water and electrolytes, but NOT of
nutrients.
A) mouth
B) stomach
C) small intestine
D) large intestine
E) None of the answers are correct. - CORRECT ANSWER -D
6) Which of the following is the sequence of layers from the lumen to the outer wall of the
digestive tract?
A) serosa, submucosa, mucosa, muscularis externa
B) submucosa, mucosa, serosa, muscularis externa
C) mucosa, submucosa, serosa, muscularis externa
D) submucosa, muscularis externa, serosa, mucosa
E) mucosa, submucosa, muscularis externa, serosa - CORRECT ANSWER -E
7) The lamina propria and mucous epithelium are components of the
A) serosa.
B) adventitia.
C) muscularis mucosa.
D) mucosa.
E) submucosa. - CORRECT ANSWER -D
, 8) The layer of connective tissue between the digestive epithelium and a layer of smooth
muscle is the
A) lamina propria.
B) muscularis mucosae.
C) submucosa.
D) submucosal plexus.
E) myenteric plexus. - CORRECT ANSWER -A
9) Contraction of the ________ alters the surface area by moving villi.
A) mucosa
B) submucosa
C) submucosal plexus
D) muscularis mucosae - CORRECT ANSWER -D
10) Rugae, plicae, and villi are all features that accomplish
A) secretion of enzymes.
B) secretion of hormones.
C) an increase in surface area.
D) immune function.
E) mechanical digestion. - CORRECT ANSWER -C
11) The motor activity of the muscularis externa is controlled by the
A) submucosal plexus.
B) myenteric plexus.
C) migrating motor complex.
D) extrinsic neurons.
E) motilin. - CORRECT ANSWER -B
CH. 21: THE DIGESTIVE SYSTEM
1) Digestion refers to the
A) progressive dehydration of indigestible residue.
B) input of food into the digestive tract.
C) release of substances into the lumen of the gut.
D) absorption of nutrients in the gut.
E) breakdown of food into particles small enough to cross epithelial cells. - CORRECT
ANSWER -E
2) Secretion refers to the
A) progressive dehydration of indigestible residue.
B) input of food into the digestive tract.
C) release of substances into the lumen of the gut.
D) absorption of nutrients in the gut.
E) breakdown of food into particles small enough to cross epithelial cells. - CORRECT
ANSWER -C
3) Identify the answer choice that lists the GI functions that are most closely regulated by
the body.
A) absorption and motility
B) digestion and motility
C) secretion and digestion
D) motility and secretion
E) motility, secretion, and digestion - CORRECT ANSWER -D
4) Which of the following is an accessory organ of digestion?
,A) stomach
B) pancreas
C) spleen
D) colon
E) esophagus - CORRECT ANSWER -B
5) The ________ is a significant site of absorption of water and electrolytes, but NOT of
nutrients.
A) mouth
B) stomach
C) small intestine
D) large intestine
E) None of the answers are correct. - CORRECT ANSWER -D
6) Which of the following is the sequence of layers from the lumen to the outer wall of the
digestive tract?
A) serosa, submucosa, mucosa, muscularis externa
B) submucosa, mucosa, serosa, muscularis externa
C) mucosa, submucosa, serosa, muscularis externa
D) submucosa, muscularis externa, serosa, mucosa
E) mucosa, submucosa, muscularis externa, serosa - CORRECT ANSWER -E
7) The lamina propria and mucous epithelium are components of the
A) serosa.
B) adventitia.
C) muscularis mucosa.
D) mucosa.
E) submucosa. - CORRECT ANSWER -D
, 8) The layer of connective tissue between the digestive epithelium and a layer of smooth
muscle is the
A) lamina propria.
B) muscularis mucosae.
C) submucosa.
D) submucosal plexus.
E) myenteric plexus. - CORRECT ANSWER -A
9) Contraction of the ________ alters the surface area by moving villi.
A) mucosa
B) submucosa
C) submucosal plexus
D) muscularis mucosae - CORRECT ANSWER -D
10) Rugae, plicae, and villi are all features that accomplish
A) secretion of enzymes.
B) secretion of hormones.
C) an increase in surface area.
D) immune function.
E) mechanical digestion. - CORRECT ANSWER -C
11) The motor activity of the muscularis externa is controlled by the
A) submucosal plexus.
B) myenteric plexus.
C) migrating motor complex.
D) extrinsic neurons.
E) motilin. - CORRECT ANSWER -B
