Oklahoma Cosmetology Board Practice Exam

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Ace your Oklahoma Cosmetology Board Exam with comprehensive practice questions covering all topics. Get ahead with multiple-choice quizzes, detailed explanations, and hints for each question.

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What is the primary function of the cuticle layer in hair?

To add color to the hair
To regulate moisture in the hair
To protect the inner layers of the hair shaft
To promote hair growth

The correct answer is: To protect the inner layers of the hair shaft

The primary function of the cuticle layer in hair is to protect the inner layers of the hair shaft. The cuticle consists of tightly packed, overlapping scales that form a protective barrier around the cortex and medulla of the hair. This outermost layer is essential in safeguarding the more delicate structures inside the hair, helping to prevent damage from environmental factors such as UV rays, heat, chemical treatments, and physical wear. By maintaining the integrity of the cuticle, hair is better able to retain moisture and overall health, contributing to its strength and appearance. When the cuticle is healthy, it lies flat and provides shine, while a damaged cuticle can lead to dullness, frizz, and increased susceptibility to breakage. This function of protection is crucial for the longevity and aesthetics of hair.