Michigan Esthetician State Board Practice Exam

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What is the correct definition of a blackhead?

Closed comedone
Open comedone
Whitehead
Pore clog

The correct answer is: Open comedone

A blackhead is defined as an open comedone, which occurs when a hair follicle becomes clogged with excess oil (sebum) and dead skin cells. The term "open comedone" refers to the fact that the surface of the clogged pore is open to the air. This exposure allows the sebum within to oxidize, turning it dark in color, which is characteristic of blackheads. Understanding this definition is important for estheticians as it helps differentiate between various forms of acne and skin conditions. For example, closed comedones refer to whiteheads, which occur when the clogged pore remains closed, leading to a white or skin-colored appearance. Knowing these distinctions aids in the proper treatment and care of clients' skin types. Additionally, while "pore clog" may seem relevant, it is a broader term that encompasses both open and closed comedones and does not specifically define blackheads.