Laser Technician IBEC Board Exam 2026 – 400 Free Practice Questions to Pass the Exam

The primary role of the sebaceous gland in relation to hair follicles is lubrication of skin and hair. Sebaceous glands are small oil-producing glands located in the dermis, and they are typically associated with hair follicles. They secrete an oily substance known as sebum, which helps to moisturize the hair and skin, preventing dryness and brittleness. This lubrication is crucial for maintaining the health of both the hair and the skin, as sebum has antibacterial properties and forms a protective barrier that can help prevent infection and dehydration.

The other options are not primary functions of the sebaceous glands. For example, while vibrissae refers to specialized sensory hairs, it is not related to the function of sebaceous glands. Although sebum can indirectly influence nutrient availability for skin health, the glands themselves do not primarily store nutrients. Insulation is more closely associated with other structures in the skin, such as adipose tissue. Thus, the lubrication provided by sebaceous glands is their most significant and relevant role with respect to hair follicles.