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Cosmetology > Chapter 9 - Hair Anatomy > Flashcards

Chapter 9 - Hair Anatomy Flashcards

1
Q

Hair porosity

A

Ability of the hair to absorb moisture

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2
Q

Hair root

A

The part of the hair contained within the follicle below the surface of the scalp

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3
Q

Hair shaft

A

The portion of hair that projects beyond the skin

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4
Q

Hair stream

A

Hair flowing in the same direction, resulting from follicles sloping in the same direction

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5
Q

Hair texture

A

Thickness and diameter of the individual hair strands

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6
Q

Helix

A

Spiral shape created by polypeptide chains that intertwine around each other

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7
Q

Hydrogen bond

A

Weak physical side bond that is easily broken by water or heat

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8
Q

Hypertrichosis

A

Condition of abnormal growth of hair , characterized by the growth of the growth of the growth of terminal hair in areas of the body that normally grow only vellum hair

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9
Q

Malassezia

A

Naturally occurring fungi that is present on all human skin, and is responsible for dandruff

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10
Q

Medulla

A

Innermost layer of the hair, composed of round cells; often absent in fine hair

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11
Q

Melanin

A

Tiny grains of pigment on the cortex that give natural color to the hair.

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12
Q

Monilethrix

A

Technical term for beaded hair

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13
Q

Pediculosis capitis

A

Infestation of the hair and scalp with head lice

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14
Q

Peptide bond or end bond

A

Chemical bond that joins amino acids to each other, end to end, to form a polypeptide chain

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15
Q

Pheomelanin

A

Melanin that provides natural hair colors from red to ginger to yellow/blond tones

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16
Q

Pityriasis

A

Dandruff; an inflammation of the skin characterized by the formation and flaking of fine, then scales.

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17
Q

Pityriasis capitis simplex

A

Technical term for classic dandruff; characterized by scalp irritation, large flakes, and itchy scalp

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18
Q

Pityriasis steatoides

A

Scalp inflammation marked by fatty (greasy or waxy) types of dandruff

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19
Q

Polypeptide chain

A

Long chain of amino acids linked by peptide bonds

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20
Q

Postpartum alopecia

A

Temporary hair loss experienced at the conclusion of a pregnancy

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21
Q

Ringed hair

A

Variety of canities characterized by alternating bands of gray and pigmented hair throughout the length o the hair strand

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22
Q

Salt bond

A

A weak, temporary side bond between adjacent polypeptide chains. Broken down by salt and ph levels

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23
Q

Scabies

A

Highly contagious disease caused by mites that burrow under the skin

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24
Q

Scutula

A

Dry, sulfer-yellow, cup-like crusts on the scalp in tinea favosa or favus

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25
Q

Sebaceous glands

A

Oil glands of the skin connected to the hair follicle

26
Q

Seborrheic dermatitis

A

Medical term for pityriasis steatoides accompanied by redness and inflammation

27
Q

Sebum

A

Oily secretion of the sebaceous glands, which lubricates the hair and skin

28
Q

Telogen

A

Resting phase; the final phase in the hair cycle that lasts until the fully grown hair is shed

29
Q

Terminal hair

A

Long hair found on the scalp characterized by red papules, or spots at the opening of hair follicles

30
Q

Tinea

A

Medical term for ringworm, a contagious condition caused by fungal infections

31
Q

Tinea favosa ( tinea favus )

A

Fungal infection characterized by dry, sulfur-yellow, cup-like crusts on the scalp, called scuttle

32
Q

Trichology

A

Science dealing with the study of hair, it’s diseases, and care

33
Q

Trichoptilosis

A

Technical term for split ends

34
Q

Trichorrhexis nodosa

A

Knotted hair characterized by brittleness and the formation of nodular swellings along the hair shaft

35
Q

Vellus or lanugo

A

Short, fine, unpigmented downy hair that appears on the body, with the exception of the palms of the hands and the soles of the feet

36
Q

Wave pattern

A

Amount of “movement” in the hair strand; described as straight, wavy, curly, an extremely curly

37
Q

Whorl

A

Hair that forms in a circular pattern, as on the crown

38
Q

Hair elasticity

A

Ability of the hair to stretch and return to its original length without breaking

39
Q

Integument

A

Largest and fastest growing organ of the body; composed of the hair, skin, an nails

40
Q

Keratinization

A

Process by which newly formed cells in the hair bulb mature, fill with keratin, move upward, lose the nucleus, an die

41
Q

Hair bulb

A

Lowest part of a hair stand; the thickened, club-shaped structure that forms the lower part of the hair root

42
Q

Hair density

A

The number of individual hair strands found in 1 square inch of the scalp

43
Q

Eumelanin

A

Melanin that gives brown and black color to hair

44
Q

Follicle

A

Tube-like depression or pocket in the skin or scalp that contains the hair root

45
Q

Furuncle

A

Boil; acute, localized bacterial infection of the hair follicle

46
Q

Fragilitas crinium

A

Technical term for brittle hair

47
Q

Disulfide bond

A

Strong chemical side bonds that join the sulfer atoms of two neighboring cysteine amino acids to create cysteine, which join together two polypeptide strands like rungs on a ladder

48
Q

Cowlick

A

Tuft of hair that strands straight up

49
Q

Cortex

A

Middle layer of the hair; a fiberous protein core formed by elongated cells containing melanin pigment

50
Q

Cuticle

A

Outermost late of hair; consisting of a single, overlapping layer of transparent, scale-like cells

51
Q

Dermal pappilla

A

Small, cone-shaped elevation located at the base of the hair follicle that fits into the hair bulb

52
Q

Arretor pili

A

Minute, involuntary muscle in the base of the hair follicle that causes “goose bumps”

53
Q

Canities

A

Technical term for gray hair, results from the loss of the hairs natural melanin pigment

54
Q

Catagen

A

The brief transition period between the growth and resting phases of a hair follicle

55
Q

Carbuncle

A

Inflammation of the subcutaneous tissue caused by staphylococci; similar to a furuncle but larger

56
Q

COHNS Elements

A

Five elements that make-up human hair, skin, tissue, and nails. (Carbon, oxygen, hydrogen, nitrogen, and sulfur)

57
Q

Anagen

A

Growth phase in the hair cycle in which a new hair shaft is created

58
Q

Alopecia areata

A

Sudden falling out of hair in round patches or baldness in spots, may occur on the scalp and elsewhere on the body

59
Q

Androgenic alopecia

A

Hair loss characterized by miniaturization of terminal hair which is converted to vellus hair; in men, it is known as male pattern baldness

60
Q

Alopecia

A

Abnormal hair loss

61
Q

Amino acids

A

Units that are joined together end to end by peptide bonds to form the polypeptide chains that comprise proteins

Cosmetology (1 decks)

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