In the human digestive system, the stomach empties chyme into the duodenum when the
Correct answer: A. Pyloric sphincter is relaxed
- A. Pyloric sphincter is relaxed
- B. Cardiac sphincter is relaxed
- C. Pyloric sphincter is contracted
- D. Cardiac sphincter is contracted
Explanation
The correct answer is that the pyloric sphincter is relaxed. In the digestive process, the pyloric sphincter plays a crucial role in regulating the flow of partially digested food from the stomach to the duodenum. When it relaxes, chyme can move into the duodenum for further digestion. The cardiac sphincter, also known as the lower esophageal sphincter, prevents the backflow of stomach contents into the esophagus and is unrelated to chyme movement into the duodenum. Therefore, options involving the cardiac sphincter are incorrect.
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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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