The thickened, club-like structure that forms the lower part of the hair root is the _____.

• dermal papilla

• arrector pili

• hair bulb

• cuticle layer

Hair is composed of protein that grows from cells originating within the _____.

• hair bulb

• medulla layer

• dermal papilla

• hair follicle

Vellus hair is also known as _____ hair.

• straight

• terminal

• lanugo

• melamine

The pigment that provides brown or black color to hair is _____.

• eumelanin

• telogen

• ionic

• pheomelanin

Current research confirms that dandruff is the result of a fungus called _____.

• capitis

• steatoides

• pyrithione

• malassezia

The body naturally produces _____ of the 20 amino acids that make up hair.

• all

• 9

• 3

• 11

A weak, physical, cross-link side bond between adjacent polypeptide chains that is broken by changes in pH is a _____ bond.

• salt

• hydrogen

• carbon

• sulfur

What term refers to the shape of the hair strand?

• Cowlick

• Hair stream

• Wave pattern

• Whorl

Temporary hair loss experienced at the end of a pregnancy is called _____.

• congenital alopecia

• androgenic alopecia

• involutional alopecia

• postpartum alopecia

What are the three growth cycles of human hair?

• Catagen, return, and transition

• Anagen, catagen, and telogen

• Anagen, growth phase, and telogen

• Anagen, transition, and mature