The ring of muscle at the junction of the oesophagus and the stomach is called the
Correct answer: D. cardiac sphincter
- A. pyloric sphincter
- B. ileocaecal valve
- C. anal sphincter
- D. cardiac sphincter
Explanation
The cardiac sphincter opens to admit food and closes to stop acid reflux into the oesophagus. The pyloric sphincter guards the stomach's exit, and mixing these two up is a classic error.
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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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