Properties of Hair and Scalp (11)

The study of hair is known as

• histology

• trichology

• bacteriology

• dermatology

the mature strand of human hair is divided into 2 principle parts known as the

• follicle and cuticle

• hair root and hair follicle

• hair shaft and follicle

• hair root and hair shaft

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

• lower follicle

• hair bulb

• dermal papilla

• arrector pili

what small involuntary muscle is attached to the underside of the 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 amino acids from a daily diet.

• 7

• 9

• 11

• 13

the 3 main layers of the hair shaft are

• inner , outer and middle

• cuticle, cortex and medulla

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

• Proteins

• melanin

• sebum

• tissue