Oklahoma Cosmetology Board Practice Exam

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What is the Cortex in reference to hair?

  1. Outer layer

  2. Inner layer

  3. Middle layer

  4. Bottom layer

The correct answer is: Middle layer

The cortex is the middle layer in a hair shaft and is responsible for giving hair its strength, texture, and color. The outer layer, or cuticle, primarily acts as a protective barrier and the inner layer, or medulla, is not present in all hair types. The bottom layer is not a term used to describe layers of hair. Therefore, the correct answer is C Middle layer.

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