PNB 2275 Final Exam Questions and Answers| New Update with 100% Correct Answers
Which of the following is an accessory organ of digestion?
A) stomach
B) pancreas
C) spleen
D) colon
E) esophagus pancreas
The serous membrane that lines the peritoneal cavity
A) secretes peritoneal fluid
B) decreases friction.
C) lubricates the cavity.
D) preventsirritation.
E) all of the above all of the above
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 above large intestine
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 mucosa, submucosa, muscularis externa,
serosa
Vitamin __________ must be complexed with a protein called __________ to be absorbed from
the small intestine.
A) B12, intrinsic factor
B) B12, pepsinogen
C) C, intrinsic factor
D) K, gastrin
E) K,pepsinogen B12, intrinsic factor
The lamina propria and mucous epithelium are components of the
A) serosa.
B) adventitia.
C) muscularis mucosa.
D) mucosa.
E) submucosa. mucosa
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. increase in surface area
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 myenteric plexus
__________ are pacemakers for slow wave activity.
A) Interstitial cells of Cajal
B) Intrinsic neuron cells
C) Extrinsic neuron cells
D) G cells
E) Chief cells Interstitial cells of Cajal
Which of the following statements is true about GI muscle contractions?
A) Phasic contractions last only seconds and can occur in the stomach and small intestine.
B) Tonic contractions are sustained for minutes and occur in the small intestine.
C) GI Smooth muscle has a very stable membrane potential which is around -70 mV.
D) Contractions of the smooth muscle depend on potassium and not on calcium.
E) More muscle fibers will be recruited to increase the GI contractile force. Phasic
contractions last only seconds and can occur in the stomach and small intestine
In GI smooth muscle
A) Adjacent cells are connected by synapses.
B) When one muscle cell contracts, the contraction spreads as a wave through the whole
tissue.
C) Contraction can only be stimulated by neurotransmitters.
D) The cells are interconnected through intercalated disks. When one muscle cell contracts,
the contraction spreads as a wave through the whole tissue
Which of the following is the driving force for chyme to move along the small intestine?
Which of the following is an accessory organ of digestion?
A) stomach
B) pancreas
C) spleen
D) colon
E) esophagus pancreas
The serous membrane that lines the peritoneal cavity
A) secretes peritoneal fluid
B) decreases friction.
C) lubricates the cavity.
D) preventsirritation.
E) all of the above all of the above
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 above large intestine
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 mucosa, submucosa, muscularis externa,
serosa
Vitamin __________ must be complexed with a protein called __________ to be absorbed from
the small intestine.
A) B12, intrinsic factor
B) B12, pepsinogen
C) C, intrinsic factor
D) K, gastrin
E) K,pepsinogen B12, intrinsic factor
The lamina propria and mucous epithelium are components of the
A) serosa.
B) adventitia.
C) muscularis mucosa.
D) mucosa.
E) submucosa. mucosa
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. increase in surface area
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 myenteric plexus
__________ are pacemakers for slow wave activity.
A) Interstitial cells of Cajal
B) Intrinsic neuron cells
C) Extrinsic neuron cells
D) G cells
E) Chief cells Interstitial cells of Cajal
Which of the following statements is true about GI muscle contractions?
A) Phasic contractions last only seconds and can occur in the stomach and small intestine.
B) Tonic contractions are sustained for minutes and occur in the small intestine.
C) GI Smooth muscle has a very stable membrane potential which is around -70 mV.
D) Contractions of the smooth muscle depend on potassium and not on calcium.
E) More muscle fibers will be recruited to increase the GI contractile force. Phasic
contractions last only seconds and can occur in the stomach and small intestine
In GI smooth muscle
A) Adjacent cells are connected by synapses.
B) When one muscle cell contracts, the contraction spreads as a wave through the whole
tissue.
C) Contraction can only be stimulated by neurotransmitters.
D) The cells are interconnected through intercalated disks. When one muscle cell contracts,
the contraction spreads as a wave through the whole tissue
Which of the following is the driving force for chyme to move along the small intestine?
