Milady's Standard Cosmetology Chapter 11: TRICHOLOGY

hydrogen bond

A ____________ is a physical bond easily broken by water or heat.

larger

A carbunble is similar to a furnucle, but it is:

Salt bond

A side bond that can be easily broken by strong alkaline or acidic solutions is called:

cowlick

A tuft of hair that stands straight up is a:

far fewer

Although there are ____________________ disulfide bonds than hydrogen or salt bonds, disulfide bonds are so much stronger that they also account for 1/3 of the hair's overall strength.

sebum

An oily substance secreted from the sebaceous glands is:

20%

By age 35, almost ____ of both men and women show some degree of hair loss.

more alkaline solutions

Compared to hair high porosity, chemical services performed on hair with low porosity require:

almost any shape

Cross-sections of hair can be:

lanugo hair

Downy vellus hair is also known as:

men only

Finasteride is an oral prescription medication for hair loss that is meant for:

more fragile

Fine hair is _________ than coarse or medium hair.

an alkaline pH

For chemical to penetrate a healthy cuticle hair layer, they must have:

soles of the feet and the palms

Hair follicles are NOT found on the:

take an emotional toll

Hair loss can

whorl

Hair that forms in a circular pattern is called a:

straight,wavy, curly, and extremely curly

Hair's wave pattern can be classified as:

2,200 hairs

How many hairs, on average are in a square inch?

medulla

Is sometimes the ___________ the innermost layer of the hair.

Terminal hairs

Mature hair that is found on the legs, arms and scalp are called:

51

Normal hair contains ___% of CARBON

6

Normal hair contains ___% of HYDROGEN

17

Normal hair contains ___% of NITROGEN

21

Normal hair contains ___% of OXYGEN

5

Normal hair contains ___% of SULFUR

1/3

Salt bonds account for about _____ of the hair's overall strength.

faster

Scalp hair grows _____________ on women than on men.

no effect

Shaving, clipping and cutting the hair on the head has ___________ on hair growth.

catagen

The __________ phase is the transition phase between active growth to complete disconnection to the dermal papilla

arrector pili

The _____________ is a tiny, involuntary muscle in the base of the hair follicle.

hair cuticle

The _____________ is the outermost layer of the hair.

Catagen

The _____________ phase can last anywhere from 1-2 weeks.

Disulfide bond

The __________________ can only be broken by permanent waves and chemical relaxers.

hair,skin, and nails

The ______________________ are part of the integumentary system.

porosity

The ability of the hair to absorb moisture is called:

years

The anagen phase generally lasts from 3 to 5: (but can be as long as 10, depending on genetic history)

1/2 inch per month

The average growth of healthy scalp hair is:

amino acids

The body can produce 11 of the 20 _____________ that make up hair.

peptide bonds

The chemical bonds that hold together the amino acid molecules are called:

protein

The cortex is made of fibrous chains of ____________

nitrogen and sulfur

The five main elements that make up the chemical composition (COHNS) of human hair are carbon, oxygen, hydrogen, and:

anagen

The growth phase during which new hair is produced is:

terminal hair

The long, coarse, pigmented hair found on the scalp, legs, arms, and bodies of males and females is called:

hair density

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

cortex

The middle layer of the hair is the:

sebaceous glands

The oil glands in the skin that are connected to the hair follicles are the:

hair bulb

The part of the hair that forms the lower part of the hair root and covers the dermal papilla, is the:

keratinization

The process whereby living cells mature, fill with a fibrous protein called keratin, and begin their journey up the hair shaft is:

trichology

The scientific study of hair.

Monilethrix

The technical term for beaded hair is:

Trichorrexis nodosa

The technical term for knotted hair is:

Trichoptilosis

The technical term for split ends is:

canities

The technical term used to describe gray hair is:

months

The telogen phase lasts anywhere from 3-6

follicle

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

hair shaft and hair root

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

5o%

Wet hair with normal elasticity will stretch up to _______ of its original length.

Blondes

Which hair color has the highest density?

Redheads/gingers

Which hair color has the lowest density?

vellus

Which type of hair never has a medula?

Eumelanin

Which type of melanin provides natural colors ranging from brown and black and darker tones?

pheamelanin

Which type of melanin provides natural colors ranging from red and ginger to yellow and blond tones?

The disulfide bond

joins the sulfur atoms of two neighboring cysteine amino acids to create one cystine.