Properties of Hair + Scalp Flashcards

1
Q

Name the 2 parts of a strand of hair

A

hair root and hair shaft

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2
Q

The hair root is below or above the epidermis

A

below

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3
Q

the hair shaft is below or above the epidermis

A

above

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4
Q

what percent protein is hair

A

90%

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5
Q

What is the process in which newly formed cells in a hair bulb mature

A

keratinization

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6
Q

name the 3 growth phases of hair

A

anagen - growth phase; 3-5 years
catagen - transition phase; follicle canal shrinks and detaches
telogen - resting, lasts until hair is shed

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7
Q

Male pattern baldness

A

androgenic alopecia

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8
Q

minoxidil vs finasteride

A

minoxidil - topical
finasteride - oral prescription for men only

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9
Q

gray hair is also known as

A

canities

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10
Q

Dandruff caused by malassezia fungus

A

pityriasis

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11
Q

ringworm; causes itching, scales, painful circular marks

A

tinea

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12
Q

ringworm of scalp; red papules and spots at opening of follicle

A

tinea capitis

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13
Q

dry sulfur yellow cuplike crusts on scalp

A

tinea favosa

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14
Q

infestation of lice

A

pediculosis capitis

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15
Q

furuncle vs carbuncle

A

furuncle - smaller; boil/bacterial infection of follicle
carbuncle - larger; inflammation of subcutaneous tissue caused by staph

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16
Q

infection of follicles caused by staph; small white pimples

A

folliculitis

17
Q

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

A

c. an alkaline pH

18
Q

During the ______ phase, new hair is produced because new cells are actively manufactured in the hair follicle
a. anagen
b. catagen
d. telogen

A

a. anagen

19
Q

Compared to pigmented hair, gray hair is
a. exactly the same
b. softer
c. more resistant
d. less resistant

A

a. the same

20
Q

hair is approximately _____ % protein
a. 60
b. 70
c. 80
d. 90

A

d. 90

21
Q

the ______ is the lowest part of the hair strand
a. hair root
b. hair bulb
c. hair cuticle
d. hair follicle

A

b. hair bulb

22
Q

Unique protein structures within the cortex are responsible for the color and _____ of hair.
a. texture
b. length
c. elasticity
d. shine

A

c. elasticity

23
Q

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

a. grouped tightly

The melanin granules in fine hair are grouped more tightly, so the hair takes color faster and can look darker.