alleryStart learning →What exactly does ingestion mean?
ATaking food in through the mouth
BBreaking food down using enzymes
CMoving nutrients into the blood
DPassing waste out through the anus
Answer & Solution
Correct answer: A. Taking food in through the mouth
1. Large molecules in intact food cannot pass through cell membranes.
2. The process begins with ingestion, taking food in through the mouth.
3. Teeth, saliva and tongue then prepare the food into a bolus.
4. Only after that can digestion break it into absorbable fragments.
_Source: OpenStax Biology 1e (CC BY 4.0), Ch 34 "Animal Nutrition and the Digestive System", section Ingestion_
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