GI GI Anatomy and Physiology 2

Question 1

Peyer's patches, lymphoid aggregates important for gut immunity, are found predominantly in which GI segment?

Accepted Answer

Ileum

Answer

Duodenum

Answer

Jejunum

Answer

Cecum

Question 2

Which hormone, released by S cells in the duodenum, stimulates pancreatic bicarbonate secretion?

Accepted Answer

Secretin

Answer

Gastrin

Answer

Cholecystokinin

Answer

Motilin

Question 3

The hepatopancreatic ampulla (ampulla of Vater) is the site where which two ducts join before entering the duodenum?

Accepted Answer

Common bile duct and main pancreatic duct

Answer

Hepatic duct and pancreatic duct

Answer

Cystic duct and common bile duct

Answer

Hepatic duct and cystic duct

Question 4

Which enzyme converts trypsinogen to active trypsin in the duodenum?

Accepted Answer

Enterokinase (enteropeptidase)

Answer

Chymotrypsin

Answer

Elastase

Answer

Carboxypeptidase A

Question 5

The crypt of Lieberkühn contains which cell type that acts as the intestinal stem cell niche regulator?

Accepted Answer

Paneth cells

Answer

Goblet cells

Answer

Enterocytes

Answer

Enteroendocrine cells

Question 6

What is the approximate transit time of contents through the entire colon in a healthy adult?

Accepted Answer

24–72 hours

Answer

2–4 hours

Answer

6–12 hours

Answer

5–7 days