question

dermal papilla

answer

A small, cone-shaped area located at the base of the hair follicle that fits into the hair bulb is the:

question

sebum

answer

The substance secreted by the sebaceous glands is called:

question

trichology

answer

The scientific study of hair, its diseases, and its care is known as:

question

hair shaft

answer

The part of the human hair that projects above the skin is known as the:

question

follicle

answer

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

question

hair bulb

answer

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

question

arrector pili

answer

The tiny, involuntary muscle fiber in the skin inserted in the base of the hair follicle is the:

question

medulla layer

answer

The three main layers of the hair shaft are the cuticle, cortex, and:

question

cuticle layer

answer

The layer that consists of transparent, scale-like cells that look like shingles on a roof is the:

question

cortex layer

answer

The fibrous protein core formed by elongated cells that contains melanin pigment is the:

question

cortex

answer

A lengthwise section of hair shows that cuticle scales overlap and each individual cuticle scale is attached to the:

question

elasticity

answer

The cortex is responsible for the natural color of hair, 90 percent of the total weight, and hair:

question

hair follicle

answer

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

question

keratinized protein

answer

The hair shaft that emerges from the scalp is a nonliving fiber composed of:

question

amino acids

answer

The units of structure that build protein and are linked end-to-end like a string of pearls are:

question

peptide bonds

answer

Chemical bonds that hold together amino acid molecules are:

question

polypeptide chains

answer

When peptide bonds hold together very long chains of amino acids, it is called a:

question

hydrogen, salt, and disulfide bonds

answer

The three different types of cross-links that form bonds between the polypeptide chains in the cortex are:

question

COHNS elements

answer

The five major elements found in skin, hair, and nails are often referred to as the:

question

hydrogen bonds

answer

A weak, temporary side bond that is easily broken by water and heat is a:

question

salt bond

answer

A temporary side bond between adjacent polypeptide chains that is broken by changes in pH is a:

question

disulfide bonds

answer

Permanent waving and hair relaxers change the shape of hair by chemically altering the hair's:

question

melanin

answer

All natural hair color is the result of pigment located in the cortex called:

question

eumelanin

answer

The melanin that provides brown or black color to hair is:

question

wave pattern

answer

The term that is used to describe the shape of the hair strand is the:

question

texture

answer

The thickness or diameter of the individual hair strand is referred to as hair:

question

coarse

answer

Hair that has the largest diameter and usually requires more processing time is:

question

density

answer

The measurement that describes the number of individual hair strands on one square inch of the scalp is:

question

porosity

answer

The ability of the hair to absorb water or oil is:

question

elasticity

answer

The ability of hair to stretch and return to its original length without breaking is referred to as hair:

question

hair stream

answer

Hair flowing in the same direction, the result of follicles sloping in the same direction form a:

question

emollients

answer

Dry hair and scalp should be treated with products that contain moisturizers and:

question

sebaceous glands

answer

Oily hair and scalp are caused by improper washing or overactive:

question

vellus or lanugo

answer

The short, fine, and downy hair that helps in the efficient evaporation of perspiration is:

question

anagen, catagen, and telogen

answer

The three growth cycles of human hair are:

question

1/2 inch per month

answer

The average growth of healthy scalp hair is about:

question

telogen

answer

The resting phase or final phase of the hair cycle that lasts until the fully grown hair is shed is the:

question

alopecia areata

answer

The sudden falling out of hair in round patches or baldness in spots is:

question

canities

answer

The technical term for gray hair is:

question

hypertrichosis

answer

The condition of abnormal hair growth of terminal hair is referred to as:

question

trichorrhexis nodosa

answer

A condition that is characterized by brittleness and the formation of nodular swellings along the hair shaft is:

question

pityriasis

answer

The medical term that is used to describe dandruff is:

question

malassezia

answer

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

question

pityriasis steatoides

answer

A severe type of dandruff characterized by an accumulation of greasy or waxy scalp scales mixed with sebum is:

question

fungal organisms

answer

Tinea is characterized by itching scales and sometimes painful circular lesions and is caused by:

question

pediculosis capitis

answer

An infestation of the hair and scalp with head lice is:

question

furuncle

answer

An acute, localized bacterial infection of the hair follicle that produces constant pain is a:

question

scabies

answer

A highly contagious skin disease caused by a parasite called a itch mite is:

question

staphylococci

answer

A carbuncle is an inflammation of the subcutaneous tissue caused by:

question

a physician

answer

A client with seborrheic dermatitis should be to referred to:

question

tinea capitis

answer

The type of fungal infection that is characterized by red papules or spots at the opening of the hair follicle is:

question

50%

answer

Virgin hair, when wet, can be stretched _______ of its length.

question

overlapped

answer

In a diagrammatic sketch of non-porous hair, the scales of the cuticle layer appear to be

question

follicle

answer

What portion of the hair structure gives shape and direction?

question

keratin

answer

One important substance that hair, nails, and skin have in common is

question

dermal papilla

answer

A small, cone-shaped area located at the base of the hair follicle that fits into the hair bulb is the:

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