Ch: 31 Properties of the Hair and Scalp (pre 9/23)

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 oil 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