Arizona Esthetics State Board Practice Exam

Which substance is commonly produced by sebaceous glands?

1. Sweat

2. Sebum

3. Melanin

4. Collagen

The correct answer is: Sebum

Sebaceous glands are specialized structures in the skin that play a crucial role in maintaining skin health. The primary substance produced by these glands is sebum, an oily secretion that helps to lubricate the skin and hair. Sebum contains a mixture of fats, waxes, and other substances, which not only moisturize the skin and provide a barrier against moisture loss but also have antimicrobial properties that help protect against bacterial infections. Sebum is vital for keeping the skin supple and preventing dryness. It forms a protective film on the skin's surface, which is essential for overall skin health. Its production can be influenced by various factors, including hormonal changes, which can affect the texture and appearance of the skin, especially during puberty or certain hormonal fluctuations. The other substances listed are produced by different glands or cells within the body. Sweat, produced by sweat glands, primarily aids in thermoregulation. Melanin, produced by melanocytes, is responsible for the pigmentation of the skin and protects against UV radiation. Collagen, on the other hand, is a structural protein made by fibroblasts, providing strength and elasticity to the skin. Each of these substances has its unique functions and is not produced by sebaceous glands.