Chapter 11 - Milady Barbering
Density
# of hair strands per square centimeter
blonds have approx _____ hairs on the head
140,000
hair shaft has _____ layers
3
Wet hair with normal elasticity will stretch up to:
50% of original length and return without breaking
adverage hair is ____% carbon
51
cortex acounts for
90 % hair weight
protein makes up ____ % of hair
91
Trichology
Scientific study of hair and its diseases and care.
Folliculitis is ____
a staphylococcal infection involving a follicle
hypertrichosis
abnormal hair growth, can be treated in barbershop
oxidation tints/chemical hair products must have pH ____
above 7
hydrogen bonds
add body to hair and keep parallel peptide chains together
male pattern baldness
androgenic alopecia in men
alopecia
any abnormal hair loss
anagen phase
any given time 90% hair is growing
secondary terminal hair
appears on scalp and beard
atoms of sulfur
atoms of neigboring cysteine amino acids joined by disulfide bonds
fragilitas crinium
brittle hair
canities
caused by loss of natural melanin
Hair texture is classified as:
coarse, medium, or fine
in the ___ polypeptide chains are linked by side bonds
cortex
Tinea favosa symptoms
dry, sulphur-yellow, cuplike crusts on scalp
hydrogen side bonds
easily broken by heat or water
Amino acids are linked by
end-to-end peptide bonds
Tinea sycosis
fungal infection that occurs chiefly over the beard area
Pityriasis steatoides characteristic
greasy/waxy scales that stick to the scalp in patches
catagen phase
hair bulb disappears
alopecia areata
hair falling out in round patches
androgenic alopecia
hair loss from genetics, age, hormonal changes that cause miniturization of terminal hair into vellus hair
sulfur, carbon, oxygen, hydrogen, and nitrogen make up ____
hair, skin, and nails
porosity
hairs ability to absorb moisture
Hair stream
hairs natural tendancy to flow to one side
resistant hair
has low porosity
3 types of side bonds
hydrogen, salt, and disulfide
healthy scalp hair grows 1/2 ____
inch per month
arrector pili
involuntary muscle fiber
fine hair
is most likely to be damaged by chemical services
visible hair
isnt alive, made of keratinized protein, possible to change color with oxidation tint
when ____ bonds are broken through overstreatching or use of strong acidic/ alkaline solutions hair will be weakened to point of breakage
just a few
hair shaft matures during ____
keratinization
coarse hair
largest diameter
hair bulb
lower part of hair root
protiens
made of amino acids
natural hair color is result of
melanin within the cortex
cortex
middle layer of hair
naturally blond hair
missing medulla
Salt bonds account for about ___ of the hair's overall strength.
one-third
Finasteride
oral medication for hair loss
Hair shaft
part of hair that exends above skin surface
Hair root
part of hair within the follicle
animal parasites cause
pediculosis capitis and scabies
dandruff
pityriasis
Keratin
protein / main component of hair
eumelanin
provides black or brown color to hair
Pheomelanin
provides red through light blond color to hair
pseudofolliculitis barbae
razor bumps
swelling hair raises _____ of cuticle layer
scales
pityriasis capitis simplex characteristics
scalp irritation, large dry flakes, and itchy scalp
sebaceous glands
secrete sebum
hair growth is not increased by
shaving, trimming, or ointments
vellus/lanugo hair
short/fine hair appearing nearly everywhere
Breaks disulfide bonds
sodium hydroxide chem hair relaxers and ammonium thioglycolate
polypeptide chain intertwines to create
spiral of protein
trichoptilosis
split ends
peptide bonds
strongest chemical bonds in cortex
disulfide bonds
strongest side bonds in cortex
exercise does not effect
subum production
dermal papilla
supplies oxygen/nutrients to tissue lining hair follicle
furuncle
technical term for boil
telogen phase
the hair is shed
minoxidil
topical treatment applied to scalp twice a day
cowlick
tuft of hair that stands straight up
hydrogen bonds broken by
water, neutral solutions, and dilute alkaline solutions
