Question

Sphincter of oddi is present at:

• A. Junction of jejunum and duodenum
• B. Ileo-caecal junction
• C. Junction of hepato-pancreatic duct and duodenum
• D. Gastro-oesophageal junction

Answer 1

The correct option is C Junction of hepato-pancreatic duct and duodenum

Opening of the hepato-pancreatic duct into the duodenum is guarded by a sphincter of Oddi.

The opening of ileum into caecum is guraded by the ileo-caecal valve.
The undigested food enters into the caecum of the large intestine through an ileo-caecal valve, which prevents the backflow of the faecal matter.

At the gastro-oesophageal junction, there is a gastro-oesophageal sphincter that controls the passage of food into the stomach.