Delaware Cosmetology and Barbering Practice Exam

What does the cuticle layer in hair prevent?

1. Moisture loss

2. Heat damage

3. Physical damage to the hair shaft

4. Color fading

The correct answer is: Physical damage to the hair shaft

The cuticle layer in hair serves as the outermost protective barrier. Its primary role is to safeguard the inner layers of the hair shaft, including the cortex and medulla, from physical damage. The cuticle is composed of overlapping scale-like cells that lie flat over one another, much like shingles on a roof. This structure helps to protect the hair from environmental stressors, mechanical wear and tear, and chemical exposures that can lead to breakage or degradation. While moisture loss, heat damage, and color fading are important concerns for hair care, the cuticle itself specifically mechanisms to prevent physical damage. Maintaining the integrity of the cuticle can help in retaining overall hair health and appearance, which further supports the function of the underlying layers.