question

The shape of the cells in the medulla layer of the hair is

answer

round

question

Chemical bonds that join amino acids are

answer

peptide bonds

question

Trichorrhexis nodosa is the technical term for:

answer

knotted hair

question

The ability of the hair to absorb moisture is:

answer

porosity

question

The most frequently encountered infection resulting from hair services is:

answer

tinea

question

A salt bond is broken by changes in

answer

pH

question

Extremely curly hair often:

answer

has a tendency to knot has low elasticity breaks easily

question

Hair follicles are distributed all over the body, with the exception of the:

answer

palms of hands and soles of feet

question

Which of the following is not considered one of the three types of side bonds of the cortex?

answer

peptide bonds

question

The layer of hair consisting of transparent, scale-like cells is the

answer

cuticle

question

The tiny grains of pigment in the cortex that give natural color to the hair are:

answer

melanin

question

Unique protein structures within the cortex are responsible for hair color and:

answer

elasticity

question

An amino acid that joins together two peptide strands is

answer

cystine

question

The follicle is the tube-like depression in the skin or scalp that contains the:

answer

hair root

question

The maturing process of hair is:

answer

keratinization

question

A physical side bond that is easily broken by water or heat is a(n)

answer

hydrogen bond

question

The condition that describes abnormal growth of hair is

answer

hypertrichosis

question

The growth phase, in which new hair is produced, is the

answer

anagen phase

question

The condition characterized by the excessive production and accumulation of skin cells is:

answer

pityriasis

question

Trichology is the scientific study of hair, its care, and

answer

diseases

question

Research has determined that dandruff is the result of a fungus called:

answer

malassezia

question

On the body, the two types of hair are vellus hair and:

answer

terminal hair

question

The final phase in the hair cycle, lasting until the fully grown hair is shed, is the:

answer

telogen phase

question

Healthy hair is naturally resistant to penetration by moisture due to the compact

answer

cuticle layer

question

Most of the total weight of hair comes from the

answer

cortex

question

Alternating bands of gray and pigmented hair throughout the length of the hair strand is called:

answer

ringed hair

question

Another term for end bond is:

answer

peptide bond

question

The spiral shape of a coiled protein is called a (n)

answer

helix

question

The term used to describe abnormal hair loss is:

answer

alopecia

question

The two parts of a mature strand of human hair are:

answer

hair root and hair shaft

question

The hair that emerges from the scalp is composed of

answer

keratinized protein

question

Pheomelanin provides hair colors ranging from

answer

red to blond

question

Sudden loss of hair in round patches on the scalp or the body is

answer

alopecia areata

question

The five major elements in skin and hair are referred to as the:

answer

COHNS elements

question

Hydroxide chemical hair relaxers break disulfide bonds and convert them to:

answer

lanthionine bonds

question

The technical term for brittle hair is

answer

fragilitas crinium

question

Which of the following is a hair growth treatment approved by the FDA for sale in the United States

answer

minoxidil and finasteride

question

The portion of the hair that projects above the skin is the

answer

shaft

question

How many people in the United States suffer from abnormal hair loss?

answer

63 million

question

Peptide bonds holding together long chains of amino acids are:

answer

polypeptide chains

question

The average hair density is about how many hairs per square inch?

answer

2,200

question

Polypeptide chains are cross-linked together and form how many types of side bonds?

answer

three

question

Bonds reformed by the use of the thio neutralizers are:

answer

disulfide bonds

question

Which type of alopecia describes temporary hair loss at the end of a pregnancy

answer

postpartum alopecia

question

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

answer

dermal papilla

question

The technical term used to describe gray hair is:

answer

canities

question

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

answer

coarse

question

The unites of structure that build proteins and are linked together end to end are:

answer

amino acids

question

The weave pattern of the hair refers to the _______ of the hair strand.

answer

shape

question

Which layer of hair provides a barrier that protects the inner structure of hair?

answer

cuticle

question

The hair, skin, nails, and glands are known collectively as the:

answer

integument

question

When a parasite called a mite burrows under the skin, the result is:

answer

scabies

question

The thickness or diameter of individual hair strands is:

answer

hair texture

question

Hair is approximately what percentage protein?

answer

90 percent

question

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

answer

hair bulb

question

Hair that forms a circular growing pattern, as on the crown of the head, is called a:

answer

whorl

question

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

answer

elasticity

question

One-third of the hair's overall strength is located in:

answer

salt bonds

question

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

answer

furuncle

question

The measurement of the individual hair strands on 1 square inch of the scalp is:

answer

density

question

People with dry hair and scalp should avoid

answer

products with high alcohol content use of strong soaps frequent shampooing

question

Which type of body hair is not pigmented and almost never has a medulla?

answer

vellus hair

question

At present, natural curl is believed to be the result of:

answer

one side of the hair strand growing faster than the other.

question

Generally, only which type of hair contains a medulla?

answer

thick, coarse hair

question

The cortex of the hair has a fibrous protein core formed by:

answer

elongated cells

question

The glands of the skin that secrete sebum are the:

answer

sebaceous glands

Chapter 11 Properties of the Hair and Scalp – Flashcards

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