Human Digestive System · NCERT Biology

Which sphincter regulates the opening of the common hepatopancreatic duct into the duodenum?

  1. Pyloric sphincter
  2. Sphincter of Oddi
  3. Anal sphincter
  4. Cardiac sphincter
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Correct answer: Sphincter of Oddi

The Sphincter of Oddi is a muscular valve that controls the flow of digestive juices (bile and pancreatic juice) into the second part of the duodenum. It prevents reflux of duodenal contents into the ducts.

Difficulty: Medium Question 13 of 20

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