Utah Esthetician State Board Practice Exam

Which protein is crucial for the pliability of the skin?

1. Collagen

2. Elastin

3. Keratins

4. Fibronectin

The correct answer is: Elastin

The protein that plays a vital role in the pliability of the skin is elastin. Elastin fibers provide skin with its ability to stretch and then return to its original shape, contributing to the skin's resilience and flexibility. This unique property is essential for maintaining skin's youthful appearance and is particularly crucial in areas of the skin that undergo frequent movement, such as around the eyes and mouth. While collagen is also an important structural protein in the skin, primarily providing strength and support, it does not contribute to pliability in the same way elastin does. Keratins are structural proteins found in the skin, hair, and nails, contributing to their toughness but not directly affecting pliability. Fibronectin is a glycoprotein that helps with cell adhesion and tissue repair but is not directly related to the skin's elasticity or pliability.