alleryStart learning →How is digestion defined?
AOnly moving food along the gut
BThe mechanical and chemical breakdown
CThe storage of nutrients in the liver
DThe removal of water from the waste
Answer & Solution
Correct answer: B. The mechanical and chemical breakdown
1. Digestion covers both kinds of breakdown, not just one.
2. It is the mechanical and chemical break down of food into small organic fragments.
3. The fragments have to be small enough to cross the digestive epithelium.
4. Proteins, polysaccharides and lipids must all be reduced to simpler particles.
_Source: OpenStax Biology 1e (CC BY 4.0), Ch 34 "Animal Nutrition and the Digestive System", section Digestion and Absorption_
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