Flashcards in 11. Hair And Scalp Deck (69):
1
Tricholigy
THe scientific study of hair, it's disease and care
2
Mature strand
Two parts are the hairs roots and hair shaft of human hair
3
Hair follicle
The tube like depression or pocket in the skin or scalp that contains the hair root
4
Hair follicles
Are not found in the soles of the feet
5
Arrector pili muscle
The small involuntary muscle in the base of the hair follicle
6
Sebum
The darth or oily substance secreted by the sebaceous glands
7
Healthy cuticle
For chemicals to penetrate the hair layer must have the alkaline pit
8
Medulla
Composed of round cells
9
Anlagen phase
New hair is produced Becuase new cells are actively manufactured in the hair follicle
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Anagen phase
New hair is produced because new cells are actively manufactured in the hair follicle
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Major elements
That make up human hair are carbon oxygen hydrogen nitrogen and sulfur
12
Peptide bonds
The strong chemical bonds that Join amino acids
13
Pheomelanin
Provides natural colors ranging from red and finger to yellow and blond tones
14
Asians
Tend to have extremely straight hair
15
Minimize tangles
Use a detangling rinse when shampooing extremely curly hair
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Hair texture
Classified as course medium or fine
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Hair density
The measurement of the number of individual hair strands on kne square inch of the scalp
18
Chemical services
Performed on hair with low proprietary required more alanine solutions
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Wet hair
With normal elasticity will stretch up to 50% of its original length and return to that length with out breaking
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Normalizing shampoo
Can treat oily hair and scalp by properly washing
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Vellus
Type of hair that almost never has a medulla
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Cartagena phase
The follicle canal shrink and detach from the dermal papilla
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Healthy scalp
The average growth is 1/2" per mo
24
Canities
Grey hair
25
Hypertrichosis
A condition of abnormal growth of terminal hair in areas of the body that normally grow only Vellus hair
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Pityriasis
Dandruff
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Dermal papilla
One of the main structures of the hair root that contains the blood and nerve supply that provides the nutrients needed for hair growth
28
Salt bonds
Account for about 1/3 of the hairs overall strength
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Anlagen phase
Generally lasts from 3 to 5 years
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Scalp hair
Grows faster on woman than on men
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Catagen phase
The follicle canal shrank and detach from the dermal papilla
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Scalp massage
Does not increase hair growth g
33
Gray hair
Exactly the same as pigmented hair
34
Cross sections
Of hair can be almost any shape
35
Bald men
Commonly perceived as less successful
36
By age 35
Almost 40% of both men and woman show some degree of hair loss
37
Finasteride
Oral prescription medication for hair loss that is meant for men only
38
Congenital Canities
Exsist at or before birth
39
Dandruff
Can easily be mistaken for dry scalp; result of fungus
40
Keratinization
When the living cells of hair form and begin their journey upward through the hair follicle and they mature in a process
41
Tinea
Characterized by itching, scales and sometimes painful circular lesions
42
Pediculosis capitis
Head lice
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Carbuncle
Similar to a furuncle but is larger
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Fine hair
Is more fragile than course or medium hair
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Course hair
Stronger than fine hair
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Hair cuticle
The outermost layer of the hair
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Sebaceous gland
The oil glands in the skin that are connected to the hair follicles
48
Hydrogen bonds
A weak physical cross link side bond easily broken by water or heat
49
Hair
Approx 90% protein
50
Alopecia totalis
Total scalp hair loss
51
Hypertrichosis
Another name is hirsuties
52
Malassezia
The naturally occurring fungus that causes the symptoms of dandruff when it grows out of control
53
Hair bulb
The lowest part of the hair strand
54
Monilethrix
Beaded hair
55
Scabies
A highly contagious skin disease cause by a parasite called a more that borrows under the skin
56
Helix
Spiral shape of a coil pattern
57
Hair growth
Is not effected by shaving, clipping or cutting the hair on the head
58
Scutula
Dry sulfer- yellow, crusts on the scalp
59
Integumentary system
Hair skin nails and glands are part of this system
60
Terminal hair
The long course pigmented hair found in the scalp legs arms and bodies of males and females
61
Trichorrhexis nodosa
Knotted hair
62
Medulla
The innermost layer of the hair and is composed of round cells
63
Whorl
When hair leaves the follicles at the angle and forms patterns or streams on the head
64
Cowlick
A particular pattern of hair stream that is aurally more noticeable on the front hairline in people with short thick hair
65
Hair porosity
The ability of the hair to absorb moisture
66
Cortex
The middle layer of the hair
67
Alopecia areata
An auto immune disorder that causes the affected hair follicles to be mistakenly attacked by a persons own immune system
68
Vellus hair
Lanugo hair
69