Question

The bile duct and the pancreatic duct open together into the duodenum as the common hepatopancreatic duct which is guarded by a sphincter called ………
A. Pyloric sphincter
B. Sphincter of Oddi
C. Ileocecal Sphincter
D. Anal Sphincter

Answer 1

Hint: The digestive system of a human has consisted of different organs. The accessory organs of the digestive system are the stomach, liver, gallbladder, pancreas, small intestine, and large intestine. The duodenum is a part of the small intestine which is located between the stomach and the middle part of the small intestine.

Complete step by step answer: The human digestive system is composed of the gastrointestinal tract with some accessory organs. These organs of digestion are salivary glands, stomach, pancreas, liver, gallbladder, small intestine, and large intestine. The liver is the largest gland of the human digestive system which is located in the abdominal cavity, just below the diaphragm. The liver has two lobes. The bile is released from the hepatic cells and moves through the hepatic ducts. The bile is preserved and concentrated in a thin muscular sac which is known as the gallbladder.
The duct of the gallbladder which is called the cystic duct and the hepatic duct from the liver both jointly build the common bile duct. The pancreas is a compound gland that means it is both an exocrine and endocrine gland. This elongated organ is located between the limbs of the ‘U’ shaped duodenum. An alkaline pancreatic juice that is enriched with enzymes is secreted from the exocrine portion of the pancreas while some hormones, insulin, and glucagon are secreted from the endocrine portion of the pancreas.
A duct from the pancreas, known as the pancreatic duct and the common bile duct are open together into the duodenum as the common hepatopancreatic duct which is known as sphincter of Oddi.
The sphincter of Oddi is the smooth muscle that guards the end portion of the common bile duct and pancreatic duct in the duodenum or the common hepatopancreatic duct. This muscle is relaxed during a meal when the bile and pancreatic juice step into the intestine.
Pyloric sphincter is made up of a band of smooth muscles and is found at the junction between the pylorus of the stomach and duodenum.
Ileocecal sphincter is located at the junction of the ileum and the colon of the large intestine. Anal sphincter is group of muscles at the end of the rectum and controls the movement of the stool.
Therefore, the correct option is option B.

Note: The stomach, liver, gallbladder, pancreas, small intestine, and large intestine are the accessory organ to the digestive system. The liver is the largest gland with two lobes and produces bile. A duct from the liver and a duct of the gall bladder form the common bile duct which is open into the duodenum along with the pancreatic duct. This opening is called the common hepatopancreatic duct which is guarded by the smooth muscle is called the sphincter of Oddi.