Pennsylvania Esthetician State Board Practice Exam

What is a strong protein substance that provides structure to the skin by forming bundles?

1. Elastin

2. Collagen

3. Keratin

4. Cholesterol

The correct answer is: Collagen

Collagen is a vital protein in the skin and is essential for maintaining its structure and elasticity. It is the most abundant protein in the human body and makes up a significant portion of the dermal layer of the skin. Collagen fibers form a dense network that provides skin with strength, resilience, and support. As the skin ages, collagen production decreases, leading to wrinkles and sagging, which underscores its importance in skin health and appearance. Elastin, while also important for skin's elasticity and flexibility, does not primarily provide structural support in the same way collagen does. Keratin is a fibrous protein that forms the structure of hair and nails, but it is not the primary protein that maintains the skin's structural integrity. Cholesterol, though present in cell membranes and involved in skin barrier function, does not play a role in providing structure like collagen does.