What is the scientific term for the study of hair and its diseases?

Trichology is the scientific study of hair, its structure, functions, and diseases.

Which layer of the hair shaft is responsible for giving hair its strength and elasticity?

The cortex is the middle layer of the hair shaft and is responsible for its strength, elasticity, and natural color.

What is the name of the outermost layer of the hair shaft composed of overlapping scale-like cells?

The cuticle is the outermost layer of the hair shaft, made of overlapping scale-like cells that protect the inner layers.

Which part of the hair follicle supplies nutrients and oxygen to promote hair growth?

The dermal papilla, located at the base of the follicle, contains blood vessels that supply nutrients and oxygen essential for hair growth.

What is the function of the arrector pili muscle in relation to hair?

The arrector pili is a small involuntary muscle attached to the follicle that contracts in response to cold or fear, causing the hair to stand erect (goosebumps).

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Trichology & Scalp – California Cosmetology State Board Exam

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