Which of the following guards the opening of hepato-pancreatic duct into the duodenum?

Semilunar valve

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Mitral valve

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Pyloric sphincter

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Sphincter of Oddi

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Solution

The correct option is D Sphincter of Oddi
The Sphincter of Oddi is a small smooth muscle sphincter strategically placed at the junction of the bile duct, pancreatic duct, and duodenum. The sphincter controls flow of bile and pancreatic juices into the duodenum and prevents reflux of duodenal content into the ducts.

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Similar questions

Hepato-pancreatic duct opens into the duodenum and carries
(a) bile (b) pancreatic juice
(c) both bile and pancreatic juice (d) saliva

	Column I		Column II
A.	Sphincter of ani internus	(i)	Opening of hepato-pancreatic duct into duodenum
B.	Cardiac sphincter	(ii)	Between duodenum and posterior stomach
C.	Sphincter of Oddi	(iii)	Guarding the terminal part of alimentary canal
D.	Ileocaecal sphincter	(iv)	Between oesophagus and anterior stomach
E.	Pyloric sphincter	(v)	Between small intestine and bowel

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