28202127
Description
Flashcards by AD Cervera, updated more than 1 year ago
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Created by AD Cervera
almost 4 years ago
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| Question | Answer |
| Dermal Papilla | small, cone-shaped elevations at the base of the hair follicles. |
| Trichology | the study of hair. |
| Hair Cuticle | the outermost layer of the hair |
| Cortex | the middle layer of the hair |
| Medulla | the innermost layer of the hair and is composed of round cells. |
| Pityriasis | the technical term for dandruff, which is characterized by the excessive production and accumulation of skin cells |
| Malassezia | a naturally occurring fungus that is present on all human skin but causes the symptoms of dandruff when it grows out of control |
| Tinea | the technical term for ringworm |
| Pediculosis capitis | is the infestation of the hair and scalp with head lice |
| Furuncle | is the technical term for a boil, an acute, localized bacterial infection of the hair follicle that produces constant pain |
| Carbuncle | is an inflammation of the subcutaneous tissue caused by staphylococci |
| Helix | The spiral shape of a coiled protein |
| keratinization | Process by which newly formed cells in the hair bulb mature, fill with keratin, move upward, lose their nucleus, and die |
| Hydrogen Bonds | A weak, physical, cross-link side bond that is easily broken by water or heat. |
| Disulfide Bonds | 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 |
| Lanthionine Bonds | The bonds created when disulfide bonds are broken by hydroxide chemical hair relaxers after the relaxer is rinsed from the hair. |
| Melanin | The tiny grains of pigment in the cortex that give natural color to the hair. |
| Vellus Hair | short, fine, unpigmented, and downy hair that appears on the body, with the exception of the palms of the hands and the soles of the feet. |
| Terminal Hair | Long, coarse, pigmented hair found on the scalp, legs, arms, and bodies of males and females. |
| Anagen | phase during which new hair is produced. |
| Catagen | The brief transition period between the growth and resting phases of a hair follicle. It signals the end of the growth phase. |
| Telogen | the final phase in the hair cycle that lasts until the fully grown hair is shed. |
| Trichoptilosis | Technical term for split ends. |
| Canities | Technical term for gray hair; results from the loss of the hair’s natural melanin pigment. |
| Hypertrichosis | condition of abnormal growth of hair, characterized by the growth of terminal hair in areas of the body that normally grow only vellus hair. |
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