Properties of Hair + Scalp Flashcards
Name the 2 parts of a strand of hair
hair root and hair shaft
The hair root is below or above the epidermis
below
the hair shaft is below or above the epidermis
above
what percent protein is hair
90%
What is the process in which newly formed cells in a hair bulb mature
keratinization
name the 3 growth phases of hair
anagen - growth phase; 3-5 years
catagen - transition phase; follicle canal shrinks and detaches
telogen - resting, lasts until hair is shed
Male pattern baldness
androgenic alopecia
minoxidil vs finasteride
minoxidil - topical
finasteride - oral prescription for men only
gray hair is also known as
canities
Dandruff caused by malassezia fungus
pityriasis
ringworm; causes itching, scales, painful circular marks
tinea
ringworm of scalp; red papules and spots at opening of follicle
tinea capitis
dry sulfur yellow cuplike crusts on scalp
tinea favosa
infestation of lice
pediculosis capitis
furuncle vs carbuncle
furuncle - smaller; boil/bacterial infection of follicle
carbuncle - larger; inflammation of subcutaneous tissue caused by staph
infection of follicles caused by staph; small white pimples
folliculitis
For chemicals to penetrate a healthy cuticle layer they must have
a. no pH
b. a neutral pH
c. an alkaline pH
d. an acidic pH
c. an alkaline pH
During the ______ phase, new hair is produced because new cells are actively manufactured in the hair follicle
a. anagen
b. catagen
d. telogen
a. anagen
Compared to pigmented hair, gray hair is
a. exactly the same
b. softer
c. more resistant
d. less resistant
a. the same
hair is approximately _____ % protein
a. 60
b. 70
c. 80
d. 90
d. 90
the ______ is the lowest part of the hair strand
a. hair root
b. hair bulb
c. hair cuticle
d. hair follicle
b. hair bulb
Unique protein structures within the cortex are responsible for the color and _____ of hair.
a. texture
b. length
c. elasticity
d. shine
c. elasticity
The melanin granules found in fine hair texture are:
a. grouped tightly
b. smaller than those found in coarse hair
c. larger than those found in coarse hair
d. grouped loosely
a. grouped tightly
The melanin granules in fine hair are grouped more tightly, so the hair takes color faster and can look darker.