Wyoming State Board Cosmetology Practice Exam 2025 - Free Cosmetology Exam Questions and Study Guide

Excessive heat can cause damage to the cuticle, which is the outermost layer of the hair shaft. The cuticle is essential for protecting the inner layers of the hair and maintaining moisture. When exposed to high temperatures, the cuticle can become compromised, leading to increased porosity, frizz, and breakage. This damage can make the hair more susceptible to other environmental factors, ultimately resulting in a dull appearance and reduced overall health.

In contrast, options such as strengthening the hair structure or moisturizing are inaccurate because excessive heat generally creates weak points in the hair, rather than reinforcing it or providing hydration. Additionally, while heat styling may temporarily change the appearance of color in the hair, it does not enhance color retention; rather, it can lead to color fading and alteration over time, especially if the hair is not properly cared for post-treatment.