Question

Sphincter of Oddi is
A. At the opening of the bile duct
B. At the opening of ductus choledocus
C. Both A and B
D. None of the above

Answer 1

Hint: The word sphincter refers to a circular muscle that normally regulates the function of maintaining constriction of an orifice or natural body passage and which relaxes as required by normal physiological functioning. Sphincter of Oddi is a part of the human digestive system that regulates the release of control of digestive juices into the small intestine.

Complete answer:
The human digestive system also called as the alimentary canal or gastrointestinal canal comprises the following organs: mouth, esophagus, pharynx, stomach, small intestine, large intestine, anus, and also accessory organs. Other than digestive organs accessory organs also play a vital role in the digestion of food.

Accessory organs are as follows: tongue, salivary gland, pancreas, liver, and gallbladder. These organs secrete digestive juices and enzymes which are necessary for the digestion of food. Saliva, amylase, and lipase are secreted by salivary glands. Bile is produced by the liver and the pancreas secretes pancreatic juices. The release of bile and pancreatic juice in the duodenum of the small intestine is controlled by the Sphincter of Oddi. The exit of the bile duct and the pancreatic duct is surrounded by the sphincter of Oddi. The common bile duct called ductus choledocus contains both the pancreatic and bile juices. Therefore, both options A and option B are correct.

Hence, option C is the correct option.

Note: Human body consists of about 60 different types of sphincters. The function of the sphincter is to regulate the function of the passage of liquids and solids. Depending upon their functions it is classified as voluntary sphincters and involuntary sphincters.