Gall bladder physiology

Question 1

Describe the process of bile excretion.

Answer 1

1. Gall bladder contracts in response to CCK hormone
2. Bile flows down cystic duct
3. To common bile duct
4. Common bile duct and pancreatic duct join at…
5. Ampulla of Vater
6. Sphincter of Oddi controls release
7. Into 2nd part of duodenum

Question 2

What is CCK?

Answer 2

Cholecystokinin

Question 3

When is CCK released?

Answer 3

After a fatty meal

Question 4

What does the gall bladder do to the bile?

Answer 4

Concentrates it by absorbing water from it.

Question 5

What type of mucosa does the gall bladder contain? Why does this help it do its role?

Answer 5

Columnar epithelium with microvilli - to facilitate absorption

Question 6

What happens when CCK is released?

Answer 6

Increased plasma CCK

Gall bladder contraction and sphincter of Oddi relaxation

Increased bile flow into common bile duct

Increased bile flow into duodenum