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Hair Design > Hair Theory > Flashcards

Hair Theory Flashcards

1
Q

What are the 2 main purposes of hair?

A

Adornment and Protection from heat and cold and injury

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2
Q

What cells are the only ones alive in the hair

A

The cells in the hair bulb

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3
Q

Define “Primitive Hair Germ”

A

Forms in the basal layer. Works it way down into the lower layer of the skin for nourishment. Pulls upper layer down with it creating the root sheath.

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4
Q

Where does hair grow from?

A

The root sheath

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5
Q

Define “Basal Layer”

A

Inner most layer of the epidermis

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6
Q

Define “Sebaceous (oil) Glands”

A

Produces sebum to prevent hair skin from becoming too dry

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7
Q

Define “sebum (oil)”

A

Mixes with perspiration to form the acid mantle

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8
Q

Define “Arrector Pilli”

A

Goose bumps. Causes hair to stand up when scared or cold. It is a muscle

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9
Q

Define “Hair Follicle”

A

tube like structure (pore) that surrounds the root and strand of a hair

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10
Q

Define “Papilla”

A

Filled with capillaries that supply nourishment to cells around it

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11
Q

What is the correct formation of the hair bulb?

A
  1. Primitive Hair Germ
  2. Basal Layer
  3. Sebaceous Glands
  4. Hair Follicle
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12
Q

Define a “straight” hair bulb and its follicle shape

A

It’s perpendicular to scalp with a slight “tilt”
Follicle Shape” Round or Oval

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13
Q

Define a “Wavy” hair bulb and its follicle shape

A

Its more curved to scalp
Follicle Shape: More Oval

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14
Q

Define “Curly” hair bulb and its follicle shape”

A

Its almost parallel to the scalp
Follicle Shape: Flattened elliptical

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15
Q

What determines the shape of the hair shaft?

A

the Shape of the follicle determines the shape of the hair shaft as it grows from the follicle

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16
Q

What are the 2 primary parts of the hair shaft?

A

Hair Root
Hair Fiber

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17
Q

Define “Hair Root”

A

Portion of hair inside the hair follicle under the skins surface

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18
Q

Define “Hair Fiber”

A

Portion of hair that extends above the skins Surface

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19
Q

What undergoes cells division to produce cells that ultimately keratinize and form the three layers of hair?

A

Germinal Matrix

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20
Q

Name the three layers of the hair

A

Cuticle
Cortex
Medulla

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21
Q

Define “Cuticle”

A

Outer covering of the hair shaft.
Its hard and resistant

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22
Q

Define “Cortex”

A

Second Layer with a unique protein structure. Soft and Elastic

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23
Q

Define “Medulla”

A

Central core of the hair shaft

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24
Q

Define “Acid Mantle”

A

Protects cuticle of hair fibers. Maintains the natural Ph of hair skin. Friction

25
Q

What is the “process of cells changing shape, drying out and forming keratin protein”?

A

Keratinization

26
Q

What are the C.O.H.N.S Elements?

A

Carbon
Oxygen
Hydrogen
Nitrogen
Sulfer

27
Q

What are the stages of hair growth?

A
  1. Anagen
  2. Catagen
  3. Telogen
28
Q

Define “Anagen” in the growth stage of hair

A

its active growing and is attached to the root sheath. 90 % of hair in this stage color is darker

29
Q

Define “Catagen” in the growth stage of hair

A

Transitional stage.
Cell division stops.
Usually lasts a couple weeks

30
Q

Define “Telogen” in the growth stage of hair

A

Resting Stage.
Not attached to root sheath.
Hair fall out

31
Q

What are three factors that can effect the behavior of hair?

A

Heredity
Environment or weather
Products or appliances

32
Q

What is “Heredity”?

A

Determines structure, color, shape, and diameter

33
Q

What behavior does the environment and weather do to the hair?

A

Affects the absorption of moisture from air

34
Q

How does products and appliances affect the behavior of hair?

A

Affects structural organization of hair

35
Q

Define “Melanin”

A

Amount, Size and Distribution

36
Q

What contains the pigment of melanin?

A

Melanosomes which is produced by melanocytes

37
Q

What influences the result of hair?

A

Melanin

38
Q

What hair color will be produce with Eumelanin?

A

Brown/Black

39
Q

What hair color will be produce with Pheomelanin?

A

Red/Yellow

40
Q

What is Albinism?

A

The total lack of pigmentation in hair and skin

41
Q

What produces the gray color in hair?

A

Reduced melanin in cortex. Referred to as mottled hair. Grows from papilla with gray color. Results usually with aging. Can be caused by serious illness, emotional conditions and heredity

42
Q

Define “Density”

A

Number of active hair follicles per square inch on scalp. Usually referred to as light medium or heavy. Influences the amount of hair that should be parted and wrapped around a perm tool, roller, or curling iron.

43
Q

Define “Texture”

A

Degree of coarseness or fineness in the hair fiber. Fine hair is more cuticle then coarse hair.

44
Q

Define “Porosity”

A

Ability of the hair to absorb moisture, liquids, or chemicals

45
Q

Define “Elasticity”

A

Ability of hair to stretch and return to its original shape without breaking. Normal hair is capable of stretching 1/5 20% of its length. Wet Hair is able to be stretched 40% to 50% of its length

46
Q

Define “Lanugo”

A

Fine silky hair covering body before birth

47
Q

Define “Vellus”

A

Short fine non-pigmented hair that replaces lanugo hair

48
Q

Define “Terminal”

A

Long, thick pigmented hair such as scalp and eyebrow hair

49
Q

Define “Androgenic hair loss”

A

Most common

50
Q

Define “Alopecia”

A

Excessive hair loss, caused by fungal or bacterial infection or inflammatory disease of scalp. Occurs in both men and women.

51
Q

Define “Androgenic Alopecia”

A

Progressive shrinking or miniaturization of certain scalp follicles. Most common form of alopecia. Male pattern baldness. thinning for females.

52
Q

Define “Postpartum Alopecia”

A

Temporary Hair loss

53
Q

Define “Alopecia Areata”

A

Autoimmune disease. Sudden loss of hair in round or irregular patches.

54
Q

Define “Totalis”

A

Total loss of hair to scalp

55
Q

Define “Universalis”

A

loss of hair over entire scalp and body

56
Q

Define “Prematura”

A

Baldness early

57
Q

Define “telogen effluvium”

A

premature shedding of hair during vesting stage

58
Q

Define “Traction or traumatic alopecia”

A

Hair loss from excessive pulling

Hair Design (15 decks)

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