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| ______ is the scientific study of hair and its disease and care, which comes from the Greek word ____, meaning "hair" and ____, meaning "the study of." | Trichology, trichos, and ology.
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| A mature strand of hair is divided into two parts: the ____, located below the surface of the epidermis, and the ____, the portion of the hair that projects above the epidermis. | Hair root and hair shaft.
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| The tube-like depression or pocket in the skin or scalp that contains the hair root. | Hair follicle
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| Small, cone-shaped elevation located at the base of the hair follicle that fits into the hair bulb. | Dermal papilla
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| Small, involuntary muscle in the base of the hair follicle. | Arrector pili muscle
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| The oil gland in the skin that are connected to the hair follicle. | Sebaceous glands
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| The lowest part of the hair strand is called the hair _____. | Bulb
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| The 3 main layers of the hair shaft are.. | 1. Hair cuticle
2. Cortex
3. Medulla
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| Hair is filled up with _____ _______ that grows cells originating within the hair follicle. | Fibrous protein
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| What does COHNS stand for?? What are the Percentages?? | C- carbon 51%
O- oxygen 21%
H- hydrogen 6%
N- nitrogen 17%
S- sulfur 5%
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| The COHNS elements are found in the ____ and the _____. | Skin and nails.
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| These type of side bonds are broken by alkaline or acid solutions | Salt bonds
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| ____ are the coloring matter in the cortex that give natural color to the hair. | Melanin
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| _________ is the lighter pigment that provides natural colors ranging from red to ginger to yellow to blonde tones. | Phenomelanin
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| Units that are joined together and make up proteins | Amino acids
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| The strong, chemical bond that joins amino acids | Peptide bond
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| The ____ _______ of hair refers to the shape of the hair strand and is described as straight, wavy, curly, or extremely curly. | Wave pattern
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| The 2 main types of hair found on the body are ____ hair and _____ hair. | Vellus and Terminal
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| Is the short, fine, un-pigmented, and downy hair that appears on the body. | Vellus hair
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| On adults, vellus hair is usually found on the | Forehead, eyelids, and bald scalp
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| Terminal hair is found on the | Scalp, legs, arms, and bodies of males and females.
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| The 3 phases of the growth cycle are | 1. Anagen
2. Catagen
3. Telogen
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| Gray hair has no _______. | Melanin
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| Hair loss in round patterns is referred to as | Alopecia areata
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| A topical medication that is put on the scalp twice a day, and is sold over the counter as a non-prescription drug, is _________. The most commonly known product that contains this drug is called Rogaine. | Minoxidil
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| Technical term for gray hair is | Canities
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| Technical term for split ends is | Trichoptilosis
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| Technical term for knotted hair is | Trichorrhexis nodosa
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| Technical term for beaded hair is | Monilethrix
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| Infection of the hair follicle caused by staphlococcus is | Folliculitis
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| Fungal infection characterized by red papules, or spots, at the opening of the hair follicle is | Tinea capitis
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| _____ is caused by a parasite called a mite | Scabies
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| _____ is the infestation of the hair and scalp with head lice. | Pediculosis capitis
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| ______ an acute, localized bacterial infection of the hair follicle. | Furuncle
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| ________ is the thickness or diameter of the individuals hair strand. 3 types are coarse, medium, or fine. | Texture
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| _______ is the number of individual hair strands per square inch. | Density
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| The 3 porosity levels are known as | 1. Low (resistant)
2. Average (normal)
3. High (overly porous)
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| Hair elasticity is an indication of | The strength of the side bonds that held the hairs individual fibers in place.
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| Hair stream that had circular patterns outward from a central point. | Whorl
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