Washington Esthetician State Board Practice Exam

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What is the predominant component of the dermis that makes up approximately 70% of its structure?

Elastin
Collagen
Adipose tissue
Keratin

The correct answer is: Collagen

Collagen is the predominant component of the dermis, accounting for approximately 70% of its structure. This fibrous protein provides strength and support, contributing significantly to the skin's overall structure and resilience. Collagen fibers form a dense network that helps to maintain the skin's firmness and elasticity, playing a crucial role in wound healing and skin integrity. As we age, collagen production decreases, leading to visible signs of aging such as wrinkles and loss of skin firmness. This highlights the importance of collagen not only in maintaining healthy skin but also in aesthetic treatments aimed at improving skin texture and appearance. The other components mentioned, while important, do not compose the majority of the dermis. Elastin, for instance, provides elasticity but is present in lesser amounts compared to collagen. Adipose tissue is primarily located beneath the skin rather than within the dermis itself and serves as a source of energy and insulation. Keratin is a protein found mainly in the outer layer of the skin (epidermis) and plays a crucial role in forming the protective barrier of the skin but does not contribute to the structural composition of the dermis directly.