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.