Red Seal Cosmetology Practice Exam

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Prepare for the Red Seal Cosmetology Exam. Utilize flashcards and multiple choice questions with hints and explanations to get exam ready. Start your journey towards certification!

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What is the cortex of the hair?

The innermost layer
The outer layer
The middle layer made of a fibrous protein core
A layer made of sebum

The correct answer is: The middle layer made of a fibrous protein core

The cortex of the hair is the middle layer of the hair shaft, made up of a fibrous protein core. This layer provides strength, elasticity, and color to the hair. Option A is incorrect because the innermost layer of hair is the medulla, which is primarily air space. Option B is incorrect because the outer layer of hair is the cuticle, which is flat and thin. Option D is incorrect because sebum is not a layer of the hair, but rather an oily substance produced by the sebaceous glands in the skin to lubricate and protect the hair and skin.