exam.txt

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Author:
darcilopez
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25492
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exam.txt
Updated:
2010-07-01 20:15:30
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cosmetology
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chapter 9
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  1. the scientific study of hair, its diseases and care is called
    trichology
  2. the two parts of a mature hair strand are the hair shaft and
    hair root
  3. the portion of the hair that projects above the skin is the
    hair shaft
  4. the follicle bulb papilla arrector pili muscle and sebaceous glands are main structures of the
    hair root
  5. the tubelike depression or pocket in the skin or scalp that contains the hair root is the
    follicle
  6. hair follicles are not found on teh palms of the hands or the
    soles of the feet
  7. the follicle extends downward from the epidermis where it surrounds the
    dermal papilla
  8. the lowest area or part of the hair strand is the
    hair bulb
  9. a small cone shaped area at the base of the hair follicle that fits into the hair bulb is the
    dermal papilla
  10. a tiny involuntary muscle fiber inserted in the base of the hair
    arrector pili
  11. the oil glands of the skin connected to the hair follicles are
    sebaceous glands
  12. an oily substance secreted from the sebaceous glands is
    sebum
  13. the overlapping layer of hair with transparent scalelike cells is
    cuticle
  14. the three main layers of the hair shaft are the cuticle medulla and
    cortex
  15. swelling the hair raises the cuticle layer and allows for
    penetration
  16. for chemicals to penetrate a healthy cuticle hair layer, they must
    have an alkaline ph
  17. the fibrous protein core of the hair formed by enlongated cells containing melanin pigment, is the
    cortex layer
  18. the medulla is the innermost layer of the hair and is composed of
    round cells
  19. hair is composed of a protein that grows from cells originating within the
    hair follicle
  20. the process whereby living cells mature and begin their journey up the hair shaft is
    keratinization
  21. the five main elements that make up the chemical composition of human hair are barbon, oxygen, hydrogen, and
    nitrogen and sulfer
  22. the chemical bonds that hold together the amino acid molecules are
    peptide bonds
  23. an end bond is also known as
    peptide bond
  24. when peptide bonds hold together a very long chain of amino acids it is called a
    polypeptide chain
  25. the three types of cross links that form the bonds between the polypeptide chains are hydrogen bonds salt bonds and
    disulfide bonds
  26. a weak type of physical side bond that is easily broken by water or heat is a
    hydrogen bond
  27. a salt bond is easily broken with the use of
    strong alkaline or acidic solutions
  28. bonds that must be chemically separated are
    disulfide bonds
  29. hydrogen chemical hair relaxers break disulfide bonds and during rinsing convert then to
    lanthionline bonds
  30. the natural hair pigment foudn in the cortex layer of the hair is
    melanin
  31. the 2 different types of melanin are eumelanin and
    pheomelanin
  32. natural wave patters are the result of
    genetics
  33. asians tend to have
    extremely straight hair
  34. extremely curly hair grows
    in long twisted spirals
  35. to help minimize tangles in extremely curly hair when washing you shoudl use
    detangling rinse
  36. extremely curly hair may often break or knot easily due to
    low elasticity
  37. four important factors to consider in hair analysis are texture porosity...
    elasticity and density
  38. the thickness or diameter of the individual hair strand is the
    texture
  39. hair texture is classifiedas
    coarse medium or fine
  40. the measurment of individual hair strands on one square inch of the scalp is
    hair density
  41. the ability of the hair to absorb water or oil is
    porosity
  42. chemical services performed on hair with low porosity require
    more alkaline solutions
  43. hair with high porosity is often the result of
    overprocessing
  44. the ability of the hair to stretch and return without breaking is
    elasticity
  45. wet hair with normal elasticitywill stretch up to
    50 percent
  46. when shaping and styling hair considerthe hairs
    natural growth patterns
  47. dry hair and scalp can be caused by
    inactive sebaceous glands
  48. oily scalp and hair can be treated by properly shampooing with
    normalizing shampoo
  49. hair that is no pigmented and almost never has a medulla is
    vellus
  50. long, soft hair found on the scalp legs arms and bodies of males and females is
    terminal
  51. the phasesof hair growth are anagen catagen and
    telogen
  52. the growth phase where new hair is produced is
    anagen
  53. the average growth of healthy scalp hair is
    one inch a month
  54. the final resting phase in the hair growth cycle is
    telogen stage
  55. in general the cross sections of curly hair can be
    oval
  56. the term used to identify abnormal hair loss is
    alopecia
  57. the sudden falling out of hair in round patches or baldness in spots is called
    alopecica areata
  58. 2 products approved by the fda to stimulate hair growth and allowed for sale in the us are
    minoxidil and finasteride
  59. the technical term used to describe gray hair is
    canities
  60. a variety of canities characterized by alternating bands of gray and pigmented hair is
    ringed hair
  61. a condition of abnormal hair growth on areas of the body is
    hypertrichosis
  62. trichorrhexis nodosa is characterized by brittleness of the hair and formation of
    swellings along the hair shaft
  63. the technical term used to describe beaded hair is
    monilethrix
  64. the medical term for dandruff is
    pityriasis
  65. the medical term used to describe a fungal organism charactorized by itching scales and painful circular lesions is
    tinea
  66. the type of fungal infection characterized by red papules at the opening of the hair follicle is
    tinea capitis
  67. a highly contagious skin disease caused by a mite parasite is
    scabies
  68. an acute localized bacterial infection of the hair follicle that produces constant pain is
    furuncle
  69. an inflammation of the subcutaneous tissue caused by staphylococci is
    carbuncle
  70. the spread of diseases can be prevented by practicing approved
    sanitation and disinfection procedures

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