OBJECTIVE LIFE SCIENCE
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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digestion
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respiration
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energy production
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cellular absorption
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Detailed explanation-1: -The first step in this process is ingestion. Ingestion is the process of taking in food through the mouth. In vertebrates, the teeth, saliva, and tongue play important roles in mastication (preparing the food into bolus).
Detailed explanation-2: -Digestion begins in the mouth. The food is ground up by the teeth and moistened with saliva to make it easy to swallow. Saliva also has a special chemical, called an enzyme, which starts breaking down carbohydrates into sugars.
Detailed explanation-3: -Animal digestion begins in the mouth, then moves through the pharynx, into the esophagus, and then into the stomach and small intestine. Nutrients are absorbed in the small intestine and waste is prepared for elimination in the large intestine.