Explore topic-wise MCQs in Uncategorized topics.

This section includes 190 Mcqs, each offering curated multiple-choice questions to sharpen your Uncategorized topics knowledge and support exam preparation. Choose a topic below to get started.

51.

Fructose is absorped from small intestine by :

A. Simple diffusion.
B. Facilitated diffusion.
C. Na+ dependent 2ry active transport.
D. none
Answer» C. Na+ dependent 2ry active transport.
Discussion
52.

Absorption of Na ions from small intestine occur by the following except:

A. Special Na channel.
B. Cotransported with Cl.
C. Cotrannsported with glucose and amino acids.
D. None of the above.
Answer» E.
Discussion
53.

All of the followings are absorped by Na dependent 2ry active transport except:

A. Glucose and galactose.
B. Amino acids.
C. VitaminC
D. VitaminB.12
Answer» E.
Discussion
54.

Pentose is absorped from small intestine by:

A. Simple diffusion.
B. Facilitated diffusion.
C. Na+ dependant 2ry active transport.
D. none
Answer» B. Facilitated diffusion.
Discussion
55.

Vitamin D is absorped from small intestine as the absorption of :

A. Water soluble vitamins.
B. Glycerol.
C. Cholesterol.
D. Short chain fatty acids
Answer» D. Short chain fatty acids
Discussion
56.

Bile secretion is stimulated by the following except:

A. Secretion.
B. Bile salts.
C. Sympathetic stimulation.
D. increase blood flow of liver.
Answer» D. increase blood flow of liver.
Discussion
57.

Bile secretion contains the following constituents except:

A. Bile salts.
B. Cholesterol.
C. Free bilirubin.
D. Urobilinogen.
Answer» D. Urobilinogen.
Discussion
58.

The following statements about absorption of bile salts are true except:

A. Active transport occurs in the distal ileum.
B. Removal of distal ileum reduces their absorption.
C. Passive diffusion transport of them.
D. none
Answer» D. none
Discussion
59.

The following statements are correct about functions of gall bladder except:

A. The capacity of gall bladder is 20-60 ml.
B. Bile can be concentrated in gall bladder upto 12-20 folds.
C. Secretion of NaHCO3 by gall bladder prevents precipitation of calcium.
D. none
Answer» D. none
Discussion
60.

Bile salts promotes lipid absorption as a result of all the followings except:

A. Emulsifying fat.
B. Formation of micelles.
C. Activation of pancreatic lipase.
D. Non of the above.
Answer» E.
Discussion
61.

Emptying of gall bladder is stimulated by the followings except:

A. Vagal stimulation.
B. Sympathetic stimulation.
C. CCK
D. none
Answer» C. CCK
Discussion
62.

Select the single correct answer about bile pigments:

A. The principal bile pigment is bilivirdin.
B. Free bilirubin is the conjugated bilirubin.
C. Cholebilirubin is the conjugated bilirubin.
D. Urobilinogen is converted into bilirubin by action of bacteria.
Answer» D. Urobilinogen is converted into bilirubin by action of bacteria.
Discussion
63.

All the following statements about bile pigments are true except:

A. They are formed from Hb in RECs.
B. In blood bilirubin combines with plasma albumin to form conjugated bilirubin.
C. Mostly urobilinogen passes with feces as stercobilinogen.
D. none
Answer» C. Mostly urobilinogen passes with feces as stercobilinogen.
Discussion
64.

The following statements about bile salts are true except:

A. They help digestion and absorption of fat.
B. They have choleretic action.
C. They are actively absorbed from duodenum.
D. none
Answer» D. none
Discussion
65.

All the following are correct statements about liver cells except:

A. They convert amino acids into glucose.
B. They form cholesterol.
C. They release glucose when blood glucose tend to decrease.
D. They are the only site of synthesis of plasma globulins.
Answer» E.
Discussion
66.

Large intestinal secretion is stimulated by:

A. Direct stimulation.
B. Local myentric reflex.
C. Para sympathetic stimulation.
D. All of the above.
Answer» E.
Discussion
67.

Contraction of gallbladder is described by the following statement except:

A. Occur in response to CCK.
B. It is stimulated mainly by acid chyme in duodenum.
C. It is inhibited by atropine.
D. none
Answer» C. It is inhibited by atropine.
Discussion
68.

Choose a single incorrect answer about bile salts:

A. Bile salts are secreted as conjugated bile salts by liver.
B. They are converted to 2ry bile salts by action of intestinal bacteria.
C. They help absorption of calcium and iron.
D. Non of the above.
Answer» E.
Discussion
69.

Emptying of GB is inhibited by the followings except:

A. Somatostatin.
B. Sympathetic stimulation.
C. Estrogen.
D. Progesterone.
Answer» D. Progesterone.
Discussion
70.

The following statement about bile salts are correct except:

A. They are 2 types 1ry&2nd
B. They are Na+ and K+ salts of bile acids conjugated with glucoronic acid.
C. They are actively reabsorbed from the terminal ilium.
D. none
Answer» C. They are actively reabsorbed from the terminal ilium.
Discussion
71.

The following statements about succus entericus are true except:

A. It contains digestive enzymes.
B. Its secretion depends on the amount of chime in small hntestine.
C. It is secreted by intestinal glands.
D. It is released mainly by vagal stimulation.
Answer» E.
Discussion
72.

The following statements about bile secretion are correct exept:

A. Canalicular secretion represents 75%of bile secretion.
B. Ductular secretion represents 75% of bile secretion.
C. Bile is secreted by both the hepatocytes and cholangiocytes.
D. none
Answer» C. Bile is secreted by both the hepatocytes and cholangiocytes.
Discussion
73.

Pancreatic amylase is activated by:

A. Bile salts
B. Trypsin
C. Cl ions
D. Enterokinase
Answer» D. Enterokinase
Discussion
74.

Succus entericus is inhibited by the followings except:

A. Adrenaline and noradrenaline.
B. Sympathetic stimulation.
C. Prostaglandins
D. endogenous opiates.
Answer» D. endogenous opiates.
Discussion
75.

Which of the following statement about motor function of stomach is untrue?:

A. Motility of stomach increases when fat enters duodenum
B. MMC prevents duodenogastric reflex
C. Receptive relaxation of stomach is mediated by purinergic vagal fibers
D. non
Answer» B. MMC prevents duodenogastric reflex
Discussion
76.

Pancreatic lipase is activated by:

A. gastrin
B. Bile salts
C. Enterokinase
D. none
Answer» C. Enterokinase
Discussion
77.

The secretion of gastrin by the pyloric antrum ceases:

A. When the stomach is distended by a full meal
B. When the gastric mucosa contents have a pH of about 2.0
C. If histamine is injected.
D. If the vagi are stimulated.
Answer» C. If histamine is injected.
Discussion
78.

he volume of pancreatic secretion per day is about:

A. 0.6 L
B. 1.5 L
C. 3 L
D. non
Answer» C. 3 L
Discussion
79.

Secondary esophageal peristalsis:

A. Is preceded by an oral- pharyngeal phase of Swallowing .
B. Involves activation of medullary Swallowing centers .
C. Is accompanied by lower esophageal sphincter relaxation.
D. Occurs in both skeletal and smooth muscle portions of the esophagus.
Answer» D. Occurs in both skeletal and smooth muscle portions of the esophagus.
Discussion
80.

Esophageal peristalsis:

A. Is stimulated by A.CH.
B. Is initiated by vagal reflexs.
C. Can be caused by distension of the esophagus.
D. All are correct.
Answer» E.
Discussion
81.

The gastric peristalsis (True or False) :

A. Depends on the basis of electric rhythm (BER).
B. Originates at the mid point of the greater curvature and increases in intensity as it sweeps towards the pylorus.
C. Is associated with a strong contraction of the antrum ant the end of each wave.
D. Always ejects the contents of the gastric antrum into the duodenum.
Answer» B. Originates at the mid point of the greater curvature and increases in intensity as it sweeps towards the pylorus.
Discussion
82.

During a normal Swallowing sequences ,the smooth muscle which surrounds the gastro esophageal junction.

A. Remains tonically constricted until the bolus arrives at this junction.
B. Relaxes even before the oncoming peristaltic wave has arrived.
C. constricts further on the passing bolus and allows a gradual esophageal emptying.
D. Is never constrict at all , and has no participation of any kind in the Swallowing process.
Answer» C. constricts further on the passing bolus and allows a gradual esophageal emptying.
Discussion
83.

Gastric peristalsis:

A. Originates in the distal half of the stomach.
B. Is characterized by strong contractions of the antrum at the end of the wave.
C. Ejects all the contents of the antrum into the duodenum.
D. Decreases in intensity as it sweeps toward the pylorus.
Answer» C. Ejects all the contents of the antrum into the duodenum.
Discussion
84.

Colonic motility is stimulated by the following except:

A. Gastro-colic reflex.
B. Colono-colic reflex.
C. Duodeno-colic reflex.
D. none
Answer» C. Duodeno-colic reflex.
Discussion
85.

which of the following statements about salivary secretion is untrue?

A. ) saliva has constant composition regardless the rate of secretion.
B. The submandibular glands secrets about 70%of the total secretion .
C. The buccal phase of salivary secretion is due to unconditioned reflex.
D. none
Answer» B. The submandibular glands secrets about 70%of the total secretion .
Discussion
86.

Large intestine secretion is stimulated by:

A. Direct stimulation.
B. Local .myentric reflex.
C. Parasympathetic stimulation.
D. All the above.
Answer» E.
Discussion
87.

all the following statement about bile secretion are true except:

A. Bile contain cholesterol and fatty acids.
B. Hepatic bile has lower specific gravity.
C. Gall bladder bile contain less organic constituent than hepatic bile
D. none
Answer» D. none
Discussion
88.

All the follwings are true about bile salt except;

A. 50% of canalicular flow is dependent on bile salts in the enterohepatic circulation.
B. the amount of bill salts in stool is about 0.2-0.4gm/day
C. The total circulating pool of bile salts is 0.2-04gm
D. none
Answer» D. none
Discussion
89.

The so-called chemoreceptor trigger zone:

A. Is synonymous with the vomiting center
B. Is located in the cerebral peduncles, ventral to the Aqueduct of Sylvius
C. Is sensitive to the action of morphine
D. May be destroyed experimentally ; the ablation of both chemoreceptor trigger zones abolishes all forms of vomiting
Answer» D. May be destroyed experimentally ; the ablation of both chemoreceptor trigger zones abolishes all forms of vomiting
Discussion
90.

Trypsinogen in pancreatic juice is activated by:

A. Alkaline PH
B. Enterokinase
C. Bile salts
D. none
Answer» C. Bile salts
Discussion
91.

Chemotrypsinogen in pancreatic juice is activated by:

A. Enterokinase
B. Alkaline PH
C. Trypsin
D. Bile salts
Answer» D. Bile salts
Discussion
92.

The musculature of the esophagus below the pharynx is:

A. Smooth only.
B. Mainly striated.
C. Incapable of peristalsis in absence of impulses from the Swallowing center.
D. Primarily innervated by spinal nerves.
Answer» C. Incapable of peristalsis in absence of impulses from the Swallowing center.
Discussion
93.

All the following statements are true except:

A. VIP stimulates intestinal secretion and inhibits gastric acid secretions
B. Diamox (a carbonic anhydrase inhibitor) increases both gastric HCL formation and the HCO content in the pancreatic juice
C. Both gastrin and glucagons are secreted from the pyloric antrum and duodenum
D. Gastrin is secreted from almost the whole GIT mucosa
Answer» C. Both gastrin and glucagons are secreted from the pyloric antrum and duodenum
Discussion
94.

All of the following statements concerning pancreatic secretion are true except:

A. Its pH is about 8
B. Has high HCO content
C. It s secretion is primarily under neural control
D. Contains digestive enzymes
Answer» D. Contains digestive enzymes
Discussion
95.

Liver perform the following function except:

A. Haemopoiesis in adults.
B. Formation of about half of body lymph.
C. Formation of bile salts.
D. none
Answer» B. Formation of about half of body lymph.
Discussion
96.

Acid secretion in ulcer disease can be reduced by which of the following?

A. Blockage of secretin secretion
B. Blockage of histamine H receptors.
C. Blockage of action of pepsin
D. Treatment with antibiotics.
Answer» C. Blockage of action of pepsin
Discussion
97.

Emptying at ileocecal region is promoted by:

A. Distenion of cecum
B. Distention of colon.
C. Distention of stomach.
D. Sympathetic reflex.
Answer» D. Sympathetic reflex.
Discussion
98.

Basal acid output is increased with which of the following :

A. Acidification of the antrum.
B. Administration of a H receptor antagonist.
C. Vagotomy.
D. Alkalinization of the antrum.
Answer» E.
Discussion
99.

Emptying at ileocecal region is inhibited by:

A. Gastroileal reflex.
B. Gastrin
C. Colonoileal reflex.
D. Distention of terminal ilium.
Answer» D. Distention of terminal ilium.
Discussion
100.

All the following statements concerning pancreatic secretion are true except:

A. Sympathetic stimulation inhibits pancreatic HCO secretion
B. The cephalic phase accounts for about 20 % of secretion after meal
C. Pancreatic HCO3 depresses further release of secretin
D. Contains enzymes which digest polysaccharides to monosaccharides
Answer» E.
Discussion