Infection controlQuestion 1132 of 1700
What is sebum?
- A white blood cell that attacks germs
- A hard protein in the top skin layer
- An oil from skin glands that blocks bacteria
- A cleaning liquid used on the skin
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Correct answer: An oil from skin glands that blocks bacteria
Sebum helps seal hair follicle pores. Keratin is the hard protein of the skin.
Source: Nursing Assistant (Reuter), 4.3: Defenses Against Transmission of Infection
Questions last reviewed: 18 October 2026