Chapter 11: Properties of the Hair and Scalp

The scientific study of hair, its diseases, and care is called ______________.

• dermatology

• trichology

• biology

• cosmetology

The two parts of a mature strand of human hair are the __________.

• dermis and epidermis

• hair shaft and hair follicle

• hair root and hair shaft

• hair root and hair follicle

The tube-like depression or pocket in the skin or scalp that contains the hair root is the ___________.

• hair follicle

• hair shaft

• hair bulb

• scalp

Hair follicles are not found on the ____________.

• forehead area

• backs of the hands

• soles of the feet

• back of the neck

The ___________ is the small, involuntary muscle in the base of the hair follicle.

• medulla

• arrector pili muscle

• tinea

• dermal papilla

The fatty or oily substance secreted by the sebaceous glands is ___________.

• sweat

• lymph

• catagen

• sebum

For chemicals to penetrate a healthy cuticle hair layer, they must have _________.

• no ph

• a neutral ph

• an alkaline ph

• an acidic ph

The medulla is composed of ________ cells.

• rod-shaped

• round

• spiral-shaped

• rectangular

During the _________ phase, new hair is produced because new cells are actively manufactured in the hair follicle.

• anagen

• catagen

• resting

• telogen

The major elements that make up human hair are carbon, oxygen, hydrogen, __________.

• lead, and zinc

• keratin, and selenium

• boron, and calcium

• nitrogen, and sulfur