Which Structure Regulates the Passage of Food from the Stomach

Question

Which structure regulates the passage of food from the stomach into the small intestine?
A) the pharynx
B) the epiglottis
C) the stomach submucosa
D) the pyloric sphincter

Accepted Answer

The pyloric sphincter is a ring-like muscle that separates the stomach from the small intestine. Its contraction regulates the rate of passage of partially digested food (chyme) from the stomach into the small intestine, which allows for proper digestion and absorption of nutrients. The other structures listed do not have a direct role in regulating the passage of food from the stomach into the small intestine.