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Cosmo-100 > Week 3 Terms & Study > Flashcards

Week 3 Terms & Study Flashcards

1
Q

Trichology

A

The scientific study of hair and its diseases and care. Greek word trichos

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2
Q

The Hair Root

A

Part of the hair located below the surface of the epidermis

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3
Q

The Hair Shaft

A

Portion of hair that projects above the epidermis

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4
Q

Hair Follicle

A

The tube-like depression or pocket in the skin or scalp that contains the hair root.

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5
Q

Hair bulb

A

The lowest part of the hair strand

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6
Q

Dermal Papilla

A

A small, cone-shaped elevation located at the base of the hair follicle that fits into the hair bulb. “The mother of hair” because it contains the blood and nerve supply that provides the nutrients needed for hair growth

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7
Q

Arrector Pili Muscle

A

The small involuntary muscle in the base of the hair follicle

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8
Q

Sebaceous glands

A

The oil glands in the skin that are connected to the hair follicles the sebaceous glands secrete a fatty or oily substance called sebum, sebum lubricates the skin.

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9
Q

The hair cuticle

A

Is the outer most layer of the hair

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10
Q

The cortex

A

The middle layer of the hair. It is a fibrous proteins core formed by elongated cells containing melanin pigment

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11
Q

The medulla

A

The inner most layer of the hair and is composed of round cells

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12
Q

Amino Chains

A

Proteins are made of long chains of amino acids they are units that are joined together end to end like pop beads

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13
Q

Side bonds

A

3 different types that link polypeptide chains together

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14
Q

Hydrogen hydrogen bond

A

A weak physical cross-linked side bond that is easily broken by water or heat

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15
Q

A salt bond

A

Also a weak physical cross-link side bond between adjacent polypeptide chains

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16
Q

A disulfide bond

A

A strong chemical side bond that is very different from the physical side bond of a hydrogen bond or salt Pond that the sulfide bond joins the sofa or atoms of two neighboring cysteine one third of the hairs overall length

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17
Q

Lanthionine Bonds

A

Hydroxide chemical hair relaxers break the sulfide bonds and then convert them to Lanthionene bonds

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18
Q

Melanin

A

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

19
Q

Eumelanin

A

Provides natural dark brown to black color to the hair and is the dark pigment predominant in black and brunette hair

20
Q

Pheomelanin

A

The lighter pigment that provides natural colors ranging from red and ginger to yellow and blonde tones

21
Q

Wave pattern

A

The wave pattern of hair refers to the shape of the hair strand it is described as straight wavy curly or extremely curly

22
Q

Vellus Hair

A

lanugo hair short, fine, unpigmented, and downy hair that appears on the body.

23
Q

Terminal hair

A

The long, course, pigmented hair found on the scalp, legs, arms, and the bodies of males and females.

24
Q

The Anagen Phase

A

growth phase

25
Q

The Catagen Phase

A

The brief transition. Between the growth and resting phases of a hair follicle

26
Q

The telogen phase

A

Also known as resting phase is the final phase in the hair cycle and last until the fully grown hair is shed.

27
Q

Hair loss

A

100-150 hairs per day

28
Q

Hair loss for Women

A

Abnormal hair loss is not as common in women as it is in men, but it can be very traumatic and devastating for women who experience it.

29
Q

Alopecia

A

Abnormal hair loss

30
Q

Alopecia areata

A

An auto immune disorder that causes the infected hair follicle’s to be mistakenly attacked by a persons old immune system affects 5 million people in the US

31
Q

Alopecia Totalis

A

This hair disorder usually begins with one or more small, round, smooth bald patches on the scalp and can progress to total scalp hair loss.

32
Q

Postpartum alopecia

A

Is temporary hair loss experienced at the end of pregnancy

33
Q

Trichoptilosis

A

Split ends

34
Q

Trichorrhexis Nodosa

A

Knotted hair

35
Q

Fragilitas

A

Brittle hair

36
Q

Pityriasis

A

Dandruff

37
Q

Malassezia

A

Naturally occurring fungus that is present on all human skin but causes the symptoms of dandruff when it grows out of control

38
Q

Course Hair

A

Has the largest diameter

39
Q

Hair texture

A

The thickness or a diameter of the individual hair strand

40
Q

Hair density

A

Measures the number of individual hair strands on one square inch

41
Q

Hair porosity

A

The ability of the hair to absorb moisture. The degree of hair porosity is directly related to the condition of the cuticle layer.

42
Q

Hair elasticity

A

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

43
Q

Hair stream

A

Hair flowing in the same direction

44
Q

Whorl

A

When hair leaves follicles at an angle on the head

Cosmo-100 (5 decks)

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