Arkansas Esthetician Practice Exam

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Which of the following is not a function of the skin?

Excoriation
Immune defense
Protection
Temperature regulation

The correct answer is: Excoriation

The skin has several important functions, including protection, immune defense, and temperature regulation. Excoriation is the act of scratching or scraping the skin, and therefore it is not a function of the skin itself, but rather a potential consequence of skin irritation or injury. The other options are all essential functions of the skin.