PSI Barbering Practice Exam

What is the primary function of the sebaceous glands?

1. To produce sweat

2. To soften and lubricate the skin

3. To regulate body temperature

4. To filter toxins

The correct answer is: To soften and lubricate the skin

The primary function of the sebaceous glands is to soften and lubricate the skin. These glands are responsible for producing an oily substance known as sebum, which plays a crucial role in maintaining skin moisture and suppleness. Sebum helps create a barrier that keeps the skin hydrated and prevents it from becoming dry and cracked. Additionally, the lubricating properties of sebum help protect the skin from external irritants and potential infections by forming a protective layer over the skin's surface. While sweat glands are responsible for producing sweat to help regulate body temperature, that function belongs to a different set of glands entirely. Similarly, detoxification is not a primary role of sebaceous glands; rather, the skin itself can play a minor role in filtering certain toxins through various processes. Thus, the correct choice highlights the essential function of sebaceous glands in skin health and moisture retention.