Red Seal Cosmetology Practice Exam

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What does the hair cuticle consist of?

Keratinized cells
Sebum
A single overlapping layer of transparent, scale-like cells
Melanin pigment

The correct answer is: A single overlapping layer of transparent, scale-like cells

The hair cuticle is the outermost layer of the hair shaft, and is responsible for protecting the underlying layers of the hair. It is composed of a single overlapping layer of transparent, scale-like cells that are constantly renewing themselves. This structure helps to prevent damage to the hair, such as breakage and split ends. Option A, keratinized cells, is incorrect because while keratin is a protein present in hair, the cuticle specifically refers to the outermost layer. Option B, sebum, is incorrect because sebum is an oil produced by the scalp and is not a component of the hair cuticle. Option D, melanin pigment, is incorrect because melanin is responsible for the color of the hair, not the structure of the hair cuticle.