What is the function of the sebaceous glands?

What is the function of the sebaceous glands?

• A. To regulate blood flow to scalp
• B. To secrete sebum, which lubricates hair and skin
• C. To anchor hair in the follicle
• D. To produce melanin

Answer: (B)

Sebaceous glands secrete sebum, an oily substance that coats hair and the surface of the skin. This lubrication helps keep hair soft and pliable and protects skin from drying, while also contributing to a barrier against microbes. The sebum is carried through ducts into the hair follicle and onto the skin surface, which is why you often see a shine on the scalp or face. The other options describe functions of different structures—for example, regulating blood flow involves blood vessels, anchoring hair is the job of the hair follicle and related structures, and melanin production occurs in pigment cells in the epidermis. The primary role of these glands is to produce sebum to lubricate hair and skin.

Sebaceous glands secrete sebum, an oily substance that coats hair and the surface of the skin. This lubrication helps keep hair soft and pliable and protects skin from drying, while also contributing to a barrier against microbes. The sebum is carried through ducts into the hair follicle and onto the skin surface, which is why you often see a shine on the scalp or face. The other options describe functions of different structures—for example, regulating blood flow involves blood vessels, anchoring hair is the job of the hair follicle and related structures, and melanin production occurs in pigment cells in the epidermis. The primary role of these glands is to produce sebum to lubricate hair and skin.