The sphincter that controls the passage of food from the stomach into the duodenum is the
Correct answer: C. pyloric sphincter
- A. cardiac sphincter
- B. anal sphincter
- C. pyloric sphincter
- D. ileocaecal sphincter
Explanation
The pyloric sphincter opens periodically to release small squirts of chyme into the duodenum, so that the acid can be neutralised and the food digested a little at a time rather than flooding through. The cardiac sphincter guards the entrance from the oesophagus, and its weakness causes heartburn as acid rises. The ileocaecal sphincter lies between the small and large intestines.
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About Human Digestive System
The human digestive system breaks food into absorbable molecules through mechanical processing, enzyme action and chemical conditions along the alimentary canal. Questions cover the mouth, stomach, small and large intestines, liver, pancreas and associated secretions, including the digestion and absorption of carbohydrates, proteins, lipids, vitamins, minerals and water.
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