CNA Practice Test
Infection controlQuestion 1130 of 1700

What do mucous membranes do to protect the body?

  1. They produce sweat that cools the skin
  2. They produce keratin for the outer skin layer
  3. They store fat to use as energy
  4. They trap germs and debris in sticky mucus
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Correct answer: They trap germs and debris in sticky mucus

Mucus catches microbes before they go deeper. It lines places like the nose and mouth.

Source: Nursing Assistant (Reuter), 4.3: Defenses Against Transmission of Infection

Practice infection control

Questions last reviewed: 18 October 2026