What is the correct term for the sphincter controlling the opening from the stomach to the duodenum?

What is the correct term for the sphincter controlling the opening from the stomach to the duodenum?

• A. Pyloric Sphincter
• B. Cardiac Sphincter
• C. Ileocecal Valve
• D. Sphincter of Oddi

Answer: (A)

The main idea here is where this sphincter sits and what it does. The term for the ring of muscle that controls the opening from the stomach into the duodenum is the pyloric sphincter. It sits at the pylorus, the outlet of the stomach, and acts as a gate that opens to release small amounts of partially digested food (chyme) into the first part of the small intestine. By opening and closing in a regulated way, it helps control the rate of gastric emptying and prevents too much content from flooding the duodenum at once, which protects the intestine and optimizes digestion. Neural and hormonal signals adjust its opening based on what’s in the stomach and what the duodenum can handle. For context, the cardiac sphincter is at the junction between the stomach and esophagus, not the stomach and duodenum. The ileocecal valve sits between the ileum and the cecum, and the Sphincter of Oddi controls the flow of bile and pancreatic juice into the duodenum, not the passage from the stomach into the intestines.

The main idea here is where this sphincter sits and what it does. The term for the ring of muscle that controls the opening from the stomach into the duodenum is the pyloric sphincter. It sits at the pylorus, the outlet of the stomach, and acts as a gate that opens to release small amounts of partially digested food (chyme) into the first part of the small intestine. By opening and closing in a regulated way, it helps control the rate of gastric emptying and prevents too much content from flooding the duodenum at once, which protects the intestine and optimizes digestion. Neural and hormonal signals adjust its opening based on what’s in the stomach and what the duodenum can handle.

For context, the cardiac sphincter is at the junction between the stomach and esophagus, not the stomach and duodenum. The ileocecal valve sits between the ileum and the cecum, and the Sphincter of Oddi controls the flow of bile and pancreatic juice into the duodenum, not the passage from the stomach into the intestines.