In a human body, all of the following secretions contain enzymes for the digestion of dietary polysaccharides and disaccharides EXCEPT
Correct answer: B. Gastric juice
- A. Saliva
- B. Gastric juice
- C. Intestinal juice
- D. Pancreatic juice
Explanation
The question asks about secretions that do not contain enzymes for digesting polysaccharides and disaccharides. In the human digestive system:Saliva: Contains amylase, which starts breaking down starches in the mouth.Gastric Juice: Primarily contains hydrochloric acid and pepsin, focusing on protein digestion rather than polysaccharides or disaccharides.Intestinal Juice: Contains enzymes like maltase, sucrase, and lactase that further digest disaccharides into monosaccharides.Pancreatic Juice: Contains amylase, which continues the breakdown of polysaccharides in the small intestine.Therefore, gastric juice is the exception as it does not contain enzymes for the digestion of polysaccharides and disaccharides.
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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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