Properties of the Hair and Scalp

The study of hair is known as:

• histology

• bacteriology

• trichology

• dermatology

A mature strand of human hair divided into two principal parts known as the ___________.

• follicle and cuticle

• hair shaft and follicle

• hair root and follicle

• hair root and hair shaft

What is the structure in the skin or scalp encases a hair root?

• Hair follicle

• Hair bulb

• Dermal papilla

• Arrector pili

What is the lowest part of the hair strand?

• hair follicle

• hair bulb

• dermal papilla

• arrector pili

What structure is described as a small, cone -shaped elevation located at the bottom of the hair follicle?

• lower follicle

• hair bulb

• dermal papilla

• hair strand

What small involuntary muscle is attached to the underside of a hair follicle?

• arrector pili

• hair bulb

• dermal papilla

• hair strand

Oil glands of the skin, connected to the hair follicles, are known as _______________

• sudoriferous glands

• endocrine glands

• lymph glands

• sebaceous glands

Of the 20 amino acids that make up hair, a person must obtain ___________ of the essential amini acids from the daily diet.

• seven

• nine

• eleven

• thirteen

The three main layers of the hair shaft are the ________________

• outer, inner, and central

• cuticle, cortex and medulla

• cuticle, inner root, and medulla

• cortex, medulla, and dermis

What is the substance in the cortex gives natural color to the hair?

• Protein

• Melanin

• Sebum

• Tissue