Oklahoma Cosmetology Board Practice Exam

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Study for the Oklahoma Cosmetology Board Exam with comprehensive quizzes and detailed explanations. Each question comes with hints to enhance your learning experience, ensuring you are well-prepared for your licensing exam!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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What constitutes 90% of hair's weight and is responsible for its strength and elasticity?

Cuticle
Cortex
Epidermis
Sebaceous glands

The correct answer is: Cortex

The cortex is the middle layer of the hair shaft and makes up approximately 90% of the hair's weight. It consists of long tightly packed keratin fibers that provide strength and flexibility to the hair. The other options are incorrect as they do not play a significant role in the weight, strength, or elasticity of the hair. The cuticle is the outer layer that protects the hair from damage, the epidermis is the outer layer of skin, and the sebaceous glands produce oils for the hair and skin.