New Jersey Cosmetology and Hairstyling Practice Exam

What is the role of the cuticle in hair health?

1. It protects the inner layers of the hair strand and helps retain moisture

2. It determines hair color

3. It increases the shine of hair

4. It affects hair growth rate

The correct answer is: It protects the inner layers of the hair strand and helps retain moisture

The cuticle plays a vital role in maintaining hair health by serving as a protective layer for the inner structure of the hair strand. It consists of overlapping cells that create a barrier, safeguarding the underlying cortex and medulla from environmental damage, chemical exposure, and physical wear. This protective function is essential in retaining moisture, which is crucial for keeping hair hydrated, flexible, and resilient against breakage. When the cuticle is healthy, it helps to minimize moisture loss, allowing hair to maintain its natural balance and shine. Additionally, a healthy cuticle contributes to overall hair strength, which can prevent damage and promote a smoother texture. Thus, the function of the cuticle as a protectant and moisture-retaining barrier highlights its importance in overall hair health. The other options touch on aspects of hair that are influenced by different factors; the cuticle itself does not determine hair color, shine, or growth rate directly, although it can affect the appearance and longevity of color treatments and overall hair condition.