Digestion Set 5 MCQs

Q1 | Chemotrypsinogen in pancreatic juice is activated by:

Enterokinase

Alkaline PH

Trypsin

Bile salts

Q2 | Pancreatic lipase is activated by:

gastrin

Bile salts

Enterokinase

none

Q3 | All of the following statements concerning pancreatic secretion are true except:

Its pH is about 8

Has high HCO₃⁻ content

It’s secretion is primarily under neural control

Contains digestive enzymes

Q4 | The following stimulate pancreatic secretion rich in enzymes and poor in HCO₃⁻ except:

CCK

Gatrin

Secretin

Vagal stimulation

Q5 | Loss of pancreatic secretion produces the following except:

Maldigestion

Malabsorption

Dehydration

Alkalosis

Q6 | Pancreatic amylase is activated by:

Bile salts

Trypsin

Cl ⁻ ions

Enterokinase

Q7 | PH of pancreatic secretion is about:

1

6.5- 7.5

8

non

Q8 | he volume of pancreatic secretion per day is about:

0.6 L

1.5 L

3 L

non

Q9 | All the following statements concerning pancreatic secretion are true except:

Sympathetic stimulation inhibits pancreatic HCO₃⁻ secretion

The cephalic phase accounts for about 20 % of secretion after meal

Pancreatic HCO3 depresses further release of secretin

Contains enzymes which digest polysaccharides to monosaccharides

Q10 | Pancreatic secretion is inhibited by all the followings except:

Somatostatin

Glucagon

Acid in the duodenum

Sympathetic stimulation.

Q11 | All the following statements about pancreatic secretion are true except :

The intestinal phase is the main phase of pancreatic secretion .

Gastro-pancreatic reflex stimulates pancreatic secretion .

Failure of both pancreatic and biliary secretions is needed before steatorrhea develops .

none

Q12 | All the following are correct statements about pancreatic secretion except:

HCO3 rich fluid is secreted by ductal cells in response to secretin .

Secretion of enzymes by acinar cells occurs in response to CCK.

Vagotomy augment secretion of enzymes after meal .

none

Q13 | Select a single incorrect answer about pancreatic secretion.

Trypsinogen is activated by enterokinase.

Chymotrypsinogen is activated by trypsin

Pancreatic lipase is activated by alkaline pH.

none

Q14 | The following statements about pancreatic secretion are false except:

Pancreatic acini contain trypsin.

Vagal stimulation produces HCO3 rich juice.

The hormone which stimulates enzyme _ rich secretion also causes contraction of gall bladder.

none

Q15 | All the following are true about liver functions except:

Liver cells are the only important site for plasma albumin synthesis.

Liver cells can store vitamin B12.

Liver cells inactivates certain hormones by conjugation.

Essential fatty acids are synthesized in liver.

Q16 | All the following statements are correct about liver cells except:

They form non essential amino acids.

They form hippuric acid by conjugation of benzoate with glycine.

They form TPP from vitamin B6.

none

Q17 | Liver perform the following function except:

Haemopoiesis in adults.

Formation of about half of body lymph.

Formation of bile salts.

none

Q18 | Liver functions include all the followings except:

Excretion of bile.

Glycogenolysis

Glycogenesis.

Formation of essential amino acids.

Q19 | The following statements about bile secretion are correct exept:

Canalicular secretion represents 75%of bile secretion.

Ductular secretion represents 75% of bile secretion.

Bile is secreted by both the hepatocytes and cholangiocytes.

none

Q20 | all the following statement about bile secretion are true except:

Bile contain cholesterol and fatty acids.

Hepatic bile has lower specific gravity.

Gall bladder bile contain less organic constituent than hepatic bile

none

Q21 | Gall bladder bile is characterized by all the followings except:

It is relatively acidic

Darker in color.

More inorganic constituent.

Higher specific gravity.

Q22 | The following statement about bile salts are correct except:

They are 2 types 1ry&2nd

They are Na+ and K+ salts of bile acids conjugated with glucoronic acid.

They are actively reabsorbed from the terminal ilium.

none

Q23 | All the follwings are true about bile salt except;

50% of canalicular flow is dependent on bile salts in the enterohepatic circulation.

the amount of bill salts in stool is about 0.2-0.4gm/day

The total circulating pool of bile salts is 0.2-04gm

none

Q24 | The following are choleretics except:

Bile salts.

Secretin.

Acetylcholine.

Bile pigments

Q25 | Which of the followings has the highest pH:

gastric juice.

pancreatic juice.

hepatic bile.

succus entericus.