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Alopecia Areata
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Milady Standard 11.
| Question | Answer |
|---|---|
| Alopecia | Abnormal hair |
| Alopecia Areata | Autoimmune disorder that causes the affected hair follicles to be mistakenly attacked by a person's own immune system; usually begins with one or more small, round, smooth bald patches on scalp. |
| Alopecia Totalis | Total loss of scalp hair. |
| Alopecia Universalis | Complete loss of body hair. |
| Amino Acids | Units that are joined together end to end like pop beads by strong, chemical peptide bonds end bonds) to form the polypeptide chains that comprise proteins. |
| Anagen Phase | Also known as growth phase; phase during which new hair is produced. |
| Androgenic alopecia | Also known as androgenetic alopecia; hair loss characterized by miniaturization of terminal hair that is converted to vellus hair; in men, it is known as male pattern baldness. |
| Canities | Technical term for gray hair; results from loss of hair's natural melanin pigment. |
| Carbuncle | Inflammation of the subcutaneous tissue caused by staphylococci; similar to a furuncle but larger. |
| Catagen Phase | The brief transition period between the growth and resting phases of a hair follicle. It signals the end of the growth phase. |
| COHNS Elements | The five elements- carbon, oxygen, hydrogen, nitrogen, and sulfu- that make up human hair, skin, tissue, and nails. |
| Cortex | Middle layer of hair; a fibrous protein core formed by enlongated cells containing melanin pigments. |
| Cowlick | Tuft of hair that stands straight up. |
| Cysteine | An amino acid joined with another cysteine amino acid to create cycsteine amino acid. |
| Cystine | An amino acid that joins together two peptide strands. |
| Disulfide Bond | Strong chemical side bond that joins the sulfur atoms of two neighboring cysteine amino acids to create one cystine, which joins together two polypeptide strands like rungs on a ladder. |
| Fragilitas Crinium | Technical term for brittle hair. |
| Furuncle | Biol; acute, localized bacterial infection of the hair follicle that produces constant pain. |
| Hair Bulb | Lowest part of a hair strand; the thickened, club-shaped structure that forms the lowest part of hair root. |
| Hair Cuticle | Outermost layer of hair; consisting of a single, overlapping layer of transsparent, scale-like cells that look like shingles on a roof. |
| Hair Density | The number of individual hair strands on 1 square inch (2.5 square centimeters) of scalp |
| Hair Elasticity | Ability of the hair to stretch and return to its original length without breaking. |
| Hair Follicle | The tube-like depression or pocket in the skin or scalp that contains the hair root. |
| Hair Porosity | Ability of the hair to absorb moisture. |
| Hair Root | The part of the hair located below the surface of the epidermis. |
| Hair Shaft | The portion of the hair that projects above the epidermis. |
| Hair Stream | Hair flowing in the same direction, resulting from follicles sloping in the same direction. |
| Hair Texture | Thickness or diameter of the individual hair strand. |
| Helix | Spiral shape of a coiled protein created by polypeptide chains that intertwine with each other |
| Hydrogen Bond | A weak, physical, cross-link side bond that is easily broken by water or heat. |
| Hydrophilic | Easily aborbs moisture; in chemistry terma, capable of combining with or attracting water (water-loving) |
| Hydrophobic | Naturally resistant to being penetrated by moisture. |
| Hypertrichosis | Also known as hirsuties; condition of abnormal growth of hair, characterized by the growth of terminal hair in areas of the body that normally grow only vellus hair. |
| Keratinization | Process by which newly formed cells in the hair bulb mature, fill with kertin, move upward, lose their nucleus, and die. |
| Lanthionine Bonds | The bonds created disulfide bonds are broken by hydroxide chemical hair relaxers afterthe relaxeris rinsed from the hair. |
| Malassezia | Naturally occurring fungus that is present on all human skin, but is responsible for dandruff when it grows out of control. |
| Medulla | Innermost layer of the hair that is composed of round cells; often absent in fine and naturally blond hair. |
| Monilethrix | Technical term for beaded hair. |
| Pediculosis Capitis | Infestation of the hair and scalp with head lice. |
| Peptide Bond | Also known as an end bond; chemical bond that joins amino acids to each other, end to end, to form a polypeptide chain. |
| Pityriasis | Technical term for dandruff; characterized by excessive production and accumulation of skin cells. |
| Pityriasis Captis Simplex | Technical term for classic dandruff; characterized by scalp irritation, large flakes, and itchy scalp. |
| Pityriasis Steatoides | Severe case of dandruff characterized by an accumulation of greasy or waxy scales mixed with sebum, that stick to the scalp in crusts. |
| Polypeptide Chain | A long chain of amino acids linked by peptide bonds. |
| Postpartum Alopecia | Temporary hair loss experienced at the conclusion of a pregnancy. |
| Proteins | Long, coiled complex polypeptides made of amino acids. |
| Ringed Hair | Variety of canities characterized by alternating bands of gray and pigmented hair throughout the length of the hair strand. |
| Salt Bond | A weak, physical, cross-link side bond between adjacent polypeptide chains. |
| Scutula | Dry, sulfur-yellow, cup-like crusts on the scalp in tinea favosa or tinea favus. |
| Side Bonds | Bondsthat cross-link the polypeptide chains together and are responsible for the extreme strength and elasticity of human hair. |
| Telogen Phase | Also known as resting phase; the final phase in the hair cycle that lasts until the fully grown hair is shed. |
| Terminal Hair | Long, Coarse, pigmented hair found on the scalp legs, arms, and bodies of males and females. |
| Tinea | Technical term for ringworm, a contagious condition caused by fungal infection and not a parasite; characterized by itching, scales, and, sometimes, painful lesions. |
| Tinea Favosa | Also known as tinea favus; fungal infection characterized by dry, sulfuryellow, cup-like crusts on the scalp called scutula. |
| Trichology | Scientific study of hair and its diseases and care. |
| Trichoptilosis | Technical term for split ends. |
| Trichorrhexis Nodosa | Technical term for knotted hair; it is characterized by brittleness and the formation of nodular swellings along the hair shaft. |
| Vellus Hair | Also known as lanugo hair; 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. |
| Wave Pattern | The shape of the hair strands; described as straight, wavy, curly, and extremely curly. |
| Whorl | Hair that forms in a circular pattern on the crown of the head. |
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eryan21
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