What is the name of the distal gastric sphincter?

What is the name of the distal gastric sphincter?

• A. Pyloric
• B. Cardiac
• C. Esophageal
• D. Duodenal

Answer: (A)

The distal gastric sphincter is known as the pyloric sphincter. This sphincter is located at the junction between the stomach and the duodenum (the first part of the small intestine) and plays a crucial role in regulating the passage of partially digested food, known as chyme, from the stomach into the duodenum. By controlling the flow of chyme, the pyloric sphincter helps manage the digestive process, ensuring that the chyme is released at a rate that allows for efficient digestion and nutrient absorption in the small intestine.

In contrast, the other terms have different anatomical and functional implications: the cardiac sphincter, also known as the lower esophageal sphincter, is found at the junction of the esophagus and the stomach, preventing the backflow of stomach contents. The esophageal sphincter refers to this same structure, while the duodenal section pertains to the initial part of the small intestine rather than a sphincter that regulates gastric emptying. Hence, the pyloric sphincter is specifically recognized for its distal position in relation to the gastric anatomy.