Colorado Cosmetology Written Practice Exam

What is a comedo?

1. A benign cyst filled with keratin

2. A thick scar

3. A hair follicle that is plugged with sebum and keratin

4. An inflammatory disorder of the sweat glands

The correct answer is: A hair follicle that is plugged with sebum and keratin

A comedo is defined as a hair follicle that is plugged with sebum and keratin. This term is most commonly associated with types of acne, where the clogged follicle can lead to either open or closed comedones, commonly referred to as blackheads and whiteheads, respectively. The process of a comedo formation involves the accumulation of sebum, an oily substance produced by sebaceous glands, and dead skin cells, leading to blockage in the hair follicle. Understanding this concept is crucial for those in cosmetology, as it directly relates to skin care treatments and acne management. The other options do not define a comedo accurately, as a benign cyst filled with keratin refers to a different kind of skin condition, a thick scar is related to the healing process of wounds, and an inflammatory disorder of the sweat glands addresses a different aspect of skin health entirely. Each incorrect choice pertains to different dermatological conditions and reinforces the importance of precise language in the field of cosmetology.