Washington Esthetician State Board Exam 2025 – 400 Free Practice Questions to Pass the Exam

The sebaceous glands primarily function to produce oil, known as sebum, which plays a crucial role in maintaining the health of the skin and hair. Sebum serves to lubricate the skin, preventing it from becoming dry and brittle. Additionally, this oily substance creates a barrier that helps protect the skin from external pollutants and microorganisms, contributing to the overall health and resilience of the skin's surface. The presence of sebum is vital for maintaining skin moisture balance and can help to prevent conditions like acne when produced in appropriate amounts.

Other choices mention functions such as sweat production, hydration maintenance, and temperature regulation, which are related to different skin structures and functions. Sweat glands are responsible for perspiration and temperature control, while the hydration of the skin is influenced by sebum as well as other factors, such as the epidermal barrier and moisture content.