CNA Practice Test
Body systemsQuestion 772 of 1700

What do enzymes in saliva do?

  1. They crush food into pieces with the teeth
  2. They break food into smaller parts
  3. They take water out of stool in the colon
  4. They close the airway while a person swallows
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Correct answer: They break food into smaller parts

Chemical digestion uses enzymes in saliva.

Source: Nursing Assistant (Reuter), 11.3: Digestive System

Practice body systems

Questions last reviewed: 18 October 2026