Utah Master Esthetician Practice Exam

Which protein contributes to the pliability of the skin?

1. Collagen

2. Elastin

3. Keratins

4. Fibronectin

The correct answer is: Elastin

Elastin is the protein that significantly contributes to the pliability and elasticity of the skin. It allows skin to stretch and bounce back, which is crucial for maintaining youthful and resilient skin. This flexibility is essential for various movements and activities, enabling the skin to adapt to changes without losing its shape or integrity. While collagen is a critical protein that provides structural support and strength to the skin, it is primarily responsible for firmness rather than pliability. Keratins are the proteins found in hair, skin, and nails that provide protection and waterproofing but do not play a direct role in the elasticity of the skin. Fibronectin is involved in cell adhesion and is important for wound healing, but it does not contribute to the skin's elasticity like elastin does. Thus, elastin is the key protein associated with the skin's ability to stretch and return to its original form.