Electrolysis Practice Exam

Lanugo hairs, which are fine, soft hairs that typically cover the bodies of fetuses, begin their growth in a specific area associated with the sebaceous glands. The correct choice reflects that lanugo hairs are initiated in the lobe of the sebaceous gland.

Sebaceous glands are located in the dermis layer of the skin and are associated with hair follicles. During the early stages of hair development, the sebaceous glands play a crucial role in nurturing the hair follicles, aiding in their growth and maintenance. This interaction between the sebaceous glands and hair follicles is essential for the proper initiation and development of lanugo.

Other choices do not accurately represent where lanugo hairs begin their development. While the dermis is the layer where sebaceous glands reside, the initiation at the lobe of the gland specifically highlights the interaction between the gland and the hair follicle. The hair shaft reflects developed hair rather than the area of initial growth, and the epidermis, while involved with hair growth, does not initiate the lanugo development in the same manner as the sebaceous gland does. This emphasizes the specialized role of the sebaceous gland in the early stages of hair formation, particularly for lanugo.