Barber Practice State Board Practice Exam

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What is the primary purpose of excretion in skin function?

To remove waste products from the body
To maintain hydration levels
To absorb essential nutrients
To protect against infections

The correct answer is: To remove waste products from the body

The primary purpose of excretion in skin function is to remove waste products from the body. The skin plays a vital role in this process through the sweat glands, which facilitate the elimination of metabolic waste such as urea, salts, and water. This function not only helps to maintain the body's internal environment but also aids in regulating body temperature. While maintaining hydration levels, absorbing essential nutrients, and providing protection against infections are all important functions of the skin, they are not directly related to the excretory process. Hydration involves the skin's barrier function, nutrient absorption pertains more to the skin's capabilities in terms of penetration and permeability, and the protective role involves the skin as a barrier against pathogens. Therefore, the primary role of excretion through the skin is indeed focused on waste removal, distinguishing it from the other functions listed.