Case 5 - BILIARY TRACT & GALLBLADDER

Question 1

What is the lining of hepatic, cystic, and common bile ducts ?

Answer 1

simple columnar epithelium of cholangiocytes

Question 2

What does the lining epithelial cells of the gallbladder contain that indicates cells are actively transporting water ?

Answer 2

It contains :
1- mitochondria
2- microvilli
3- large intercellular spaces

Question 3

Fill in the blanks.

1) bile canaliculi + bile ductules + bile ducts merge to form = _________
2) Cystic duct ( from gallbladder ) + common bile duct merges then continues in the duodenum as = __________

3) Main pancreatic duct + common bile duct merge together at = ______
and enters the wall of duodenum at _______

Answer 3

1) common hepatic duct
2) common bile duct
3) hepatopancreatic ampulla , major papilla (of Vater)

Question 4

Which hormone induce the gallbladder contraction?

a) secretin
b) CCK ( Cholecystokinin )
c) histamine
d) Motilin

Answer 4

b) CCK ( Cholecystokinin )

Question 7

Where does the accessory pancreatic duct enters the duodenum at ?

Answer 7

Minor duodenal papilla

Question 8

What stimulates the release of CCK ?

Answer 8

presence of ingested fats in the small intestine

Question 9

What happens when the gallbladder is removed due to obstruction or chronic inflammation ?

Answer 9

Direct flow of bile from liver to gut with few major consequences on digestion

Question 10

How does the stored bile gets moved into the duodenum?

Answer 10

contraction of the gallbladder muscularis

Question 11

Cells actively transporting water for concentrating bile happens with which mechanism ?

Answer 11

By the activity of Na +pumps in the basolateral membranes, followed by passive movement of water from the bile

Question 12

Which of the following describes the lamina propria of the gallbladder?

a) thin muscularis with bundles of muscle fibers oriented in several directions
b) thin muscularis with bundles of muscle fibers oriented in only one direction
c) thick muscularis with bundles of muscle fibers oriented in several directions
d) thick muscularis with bundles of muscle fibers oriented in only one direction

Answer 12

a) thin muscularis with bundles of muscle fibers oriented in several directions

Question 14

What is the mucosa lining of the gallbladder wall ?

Answer 14

simple columnar epithelium