Deck 6: Digestive System: Bile Secretion, Gallbladder Functions, and Succus Entericus Absorption

Question 1

Bile secretion contains the following constituents except:

A)Bile salts.
B)Cholesterol.
C)Free bilirubin.
D)Urobilinogen.

Answer 1

Free bilirubin.

Question 2

Bile secretion is stimulated by the following except:

A)Secretion.
B)Bile salts.
C)Sympathetic stimulation.
D)increase blood flow of liver.

Answer 2

Sympathetic stimulation.

Question 3

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 3

Non of the above.

Question 4

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

Question 5

Emptying of gall bladder is stimulated by the followings except:

A)Vagal stimulation.
B)Sympathetic stimulation.
C)CCK
D)none

Question 6

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

Question 7

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.

Question 8

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

Question 9

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

Question 10

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.

Question 11

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

Question 12

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.

Question 13

Emptying of GB is inhibited by the followings except:

A)Somatostatin.
B)Sympathetic stimulation.
C)Estrogen.
D)Progesterone.

Question 14

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.

Question 15

Succus entericus is inhibited by the followings except:

A)Adrenaline and noradrenaline.
B)Sympathetic stimulation.
C)Prostaglandins
D)endogenous opiates.

Question 16

Intestinal proteolysis is caused by the followings except:

A)Trypsin.
B)Carboxypeptidase.
C)Chymotrypsin.
D)Pepsin.

Question 17

The intestinal brush border help digestion by the followings except:

A)Facilitating movements of intestinal content.
B)Supplying digestive enzymes and special transport system.
C)Increasing surface area of intestinal mucosa
D)none

Question 18

Cholera toxins cause diarrhea by:

A)Activation of calcium activated C1 - channels in the cells of intestinal crypts.
B)Activation of cAMP-activated C1- channels.
C)Activation of both Ca++ activated and cAMP- activated C1- channels.
D)none

Question 19

The volume of succus entericus per day is about:

A)0.6L.
B)2L.
C)3L.
D)none

Question 20

Digestion of proteins by succus entericus enzymes includes all the following enzymes except:

A)Aminopeptidase.
B)Carboxypeptidase.
C)Nucleases.
D)Dipeptidase.

Question 21

Lactase enzyme splits lactose into:

A)Glucose.
B)Glucose and galactose.
C)Glucose and fructose.
D)none

Question 22

Enteric lipase splits neutral fat into:

A)Fatty acid and glycerol.
B)Fatty acid glycerol and monoglycerides.
C)Monoglycerides.
D)none

Question 23

The main mechamism of succus entericus secretion is:

A)Vagal stimulation.
B)CCK.
C)Secretin
D)Local axon reflex

Question 24

The extracellular enzyme in succus entericus is:

A)Dipeptidase.
B)Entericlipase.
C)Lactase.
D)Enterokinase.

Question 25

The followings are true statements about absorption from small intestine except:

A)Fructose is absorbed by facilitated diffusion.
B)Glucose is absorbed by Na+ dependent 2ry active transport.
C)Vit. B12 is absorbed by diffusion
D)none