All of the following are the constituents of human saliva EXCEPT
Correct answer: B. Sucrose
- A. Mucus
- B. Sucrose
- C. Amylase
- D. Sodium bicarbonate
Explanation
The correct answer is sucrose. Human saliva contains mucus to lubricate the mouth, amylase to begin the digestion of starches, and sodium bicarbonate to help neutralize acids. Sucrose, however, is not naturally found in saliva; it is a sugar that is introduced to the mouth through food and drink. The other options, mucus, amylase, and sodium bicarbonate, are all natural components of saliva with specific functions.
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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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