Question

the structure that regulates the passage of food from the stomach into the duodenum is called the ____ sphincter
cardiac
pyloric
al
duodenal

Explanation:

The pyloric sphincter controls the movement of food from the stomach to the duodenum. The cardiac sphincter is between the esophagus and stomach, the anal sphincter is at the end of the digestive tract, and there is no "duodenal" sphincter in this context.

Answer:

B. pyloric