Indiana PSI Nail Technician Practice Test

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

Excretion
Lubrication
Absorption
Maturation

The correct answer is: Maturation

The function of maturation is not typically associated with the skin's primary roles. The skin serves several key purposes, including acting as a barrier, protecting internal organs, and regulating temperature. Excretion involves the removal of waste products through sweat glands, allowing the body to regulate its internal environment. Lubrication refers to the production of natural oils that prevent the skin from becoming dry, maintaining hydration and flexibility. Absorption pertains to the skin's ability to soak up certain substances like topical medications or moisturizers to benefit the underlying tissues. In contrast, maturation does not refer to a specific function of the skin in this context. While skin cells do undergo a maturation process as they develop from stem cells into fully formed cells, this is more about the process of cellular turnover rather than a distinct function that the skin actively performs.