NUTRITION
DIGESTIVE SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which type of digestion produces physical change to the food by breaking food into smaller pieces?
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chemical
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peristalsis
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mechanical
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saliva
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Explanation:
Detailed explanation-1: -Mechanical digestion involves physically breaking down food substances into smaller particles to more efficiently undergo chemical digestion.
Detailed explanation-2: -There are 2 types of digestion: mechanical and chemical digestion. In mechanical digestion, food is physically broken down into smaller pieces by tearing, slicing, churning and mixing.
Detailed explanation-3: -Mechanical digestion can only break up the food particles into smaller pieces. A chemical digestion process called enzymatic hydrolysis can break the bonds holding the molecular ‘building blocks’ within the food together. For example, proteins are broken down into their ‘building block’ amino acids.
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