Pyloric Sphincter is defined as what?

Pyloric Sphincter is defined as what?

• A. Muscular ring connecting the base of the stomach with the upper small intestine.
• B. Valve at the stomach entrance to the esophagus
• C. Muscle between the stomach and large intestine
• D. Sphincter at the end of the colon

Answer: (A)

The key idea is the location and role of the pyloric sphincter in digestion. It’s a muscular ring at the distal end of the stomach that forms the gateway to the upper small intestine (the duodenum). Its job is to act as a valve, controlling the emptying of stomach contents (chyme) into the duodenum and letting only small amounts pass at a time, while also helping prevent backflow into the stomach. This distinguishes it from valves at other GI junctions, such as the entrance from the esophagus to the stomach or any sphincters near the colon.

The key idea is the location and role of the pyloric sphincter in digestion. It’s a muscular ring at the distal end of the stomach that forms the gateway to the upper small intestine (the duodenum). Its job is to act as a valve, controlling the emptying of stomach contents (chyme) into the duodenum and letting only small amounts pass at a time, while also helping prevent backflow into the stomach. This distinguishes it from valves at other GI junctions, such as the entrance from the esophagus to the stomach or any sphincters near the colon.