Digestion of which food components starts from the oral cavity?
Correct answer: C. Carbohydrates
- A. Proteins
- B. Fats
- C. Carbohydrates
- D. Vitamins
Explanation
Mechanical and chemical digestion begins in the mouth with the chewing of food and the release of saliva, which starts carbohydrate digestion because saliva contains 'amylase'; the enzyme which breaks down starch. The epiglottis covers the trachea so, the bolus (ball of chewed food) does not go down into the trachea or lungs, but rather into the esophagus.
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About Digestion
The human digestive system covers the organs from mouth to anus, the movement of food, and the mechanical and chemical breakdown of carbohydrates, proteins and fats. It also includes the roles of digestive enzymes, bile, absorption through intestinal villi, and the assimilation of nutrients by body cells.
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