Card Set Information

2011-04-30 17:11:46

Integumentary System
Show Answers:

  1. Which epidermal layer is found in thick skin only?
    stratum lucidum
  2. From the basement membrane outward, the strata of the epidermis are
    basale, spinosum, granulosum, corneum
  3. Which of the following are specialized cells found in the deeper layers of the
    • tactile cells
    • epidermal dendritic cells
    • melanocytes
    • all of the above
  4. What are the most abundant cells found in the epidermis?
  5. The epidermis varies within a single individual in which of the following
    epidermis only
  6. Skin color differences among both individuals and races are mostly the result of
    • different levels of melanocyte activity
    • different colors of melanin
    • both a and b
  7. Which of the following makes no significant contribution to skin color?
  8. Dermal structures that originate from the invagination of the epidermis include
    • the accessory organs of the integument
    • sweat and sebaceous glands, nails, and hair
    • the integumentary appendages
    • all of the above
  9. Which of the following is not a significant possible health benefit of
    protects the skin from harmful radiation in sunlight
  10. Which epidermal pigment protects nuclear DNA by absorbing potentially damaging
    ultraviolet radiation?
  11. Limited exposure to ultraviolet radiation is useful because it
    helps epidermal cells convert a steroid to vitamin D3
  12. The two major regions of the dermis are the superficial ____________ layer and
    the deeper ____________ layer.
    papillary; reticular
  13. The dermal papillae interlock with deep projections of the epidermis called
    epidermal ridges
  14. Stretch marks, or striae, are the result of
    torn collagen fibers in the dermis
  15. Which statement about the subcutaneous layer is false?
    corresponding to larger body size, it is normally thicker in men than in women
  16. Both hair and nails are composed mainly of dead cells packed with
  17. Another name for a hair is
    a pilus
  18. All of the following are important functions of human hair except
    providing insulation for the overall body surface
  19. The lunula, eponychium, and hyponychium are all structures associated with a
  20. The connective tissue root sheath and epithelial root sheath are both components
    of the
    hair follicle
  21. The relatively coarse, pigmented hair of the scalp, eyebrows, and eyelashes is
    terminal hair
  22. Variations in hair color may result from
    • environmental and hormonal factors
    • genetic differences in the structure of melanin
    • an age-related decrease in pigment production
    • all of the above
  23. Hairs in the scalp normally grow
    about one-third of a millimeter per day for 2 to 5 years
  24. Which term describes the skin's normal release of water vapor without noticeable
    insensible perspiration
  25. Which integumentary exocrine glands are distributed over most of the body
    sebaceous and merocrine sweat glands
  26. Apocrine sweat glands occur in all of the following locations except
    the palms
  27. Which type of gland secretes a lipid material that coats the epidermis and hair
    shafts to provide lubrication and inhibit bacterial growth?
  28. By producing sensible perspiration, merocrine sweat glands assist in
    the epidermis thins as epidermal stem cells decline in number and activity
  29. The fibrous protein ____________ imparts the stratum corneum with strength and
    water resistance.
  30. If you stepped on a nail, the second epidermal layer it would penetrate is the
  31. The most superficial sensory receptors in the skin are called
    Merkel cells
  32. A person with defective ____________ would be particularly at risk for both
    infection and cancer in the deeper epidermal layers
    Langerhans cells
  33. The connective tissue component of the cutaneous membrane is otherwise known as
    the ____________.
  34. Which of the following is false? Ceruminous glands
    are modified sebaceous glands
  35. A result of skin exposure to UV radiation that actually promotes good health is
    synthesis of cholecalciferol
  36. Apocrine sweat glands, variously modified, serve the reproductive system through
    their secretion of
    milk and pheromones
  37. Of the following, the least specific skin problem is
  38. All of the following conditions directly involve sebaceous glands except
  39. The following statements all characterize basal cell carcinomas. Which one does
    not apply equally well to other forms of skin cancer?
    they seldom metastasize to other tissues
  40. Which of the following nail disorders might also be a symptom of kidney failure?
  41. Second-degree burns
    • may cause slight scarring
    • involve the epidermis and part of the dermis
    • cause blistering beneath the epidermis
    • all of the above
  42. The skin turns red when a fair-skinned person blushes because
    blood flow to the skin increases
  43. Generally, a "bald" man has not really lost his hair but rather has replaced his
    ____________ hairs with ____________ hairs.
    terminal; vellus
  44. The prevalence of acne during teenage years indicates that
    • sex hormones trigger increased activity in sebaceous glands as well as other
    • tissues
  45. Systemic acne treatments (taken internally) potentially have much more
    widespread, sometimes unanticipated, effects than topical treatments. For
    example, ____________ and other systemic retinoids may be powerful teratogens.
  46. Which type of acne lesion would be least responsive to antibiotic treatment?
  47. In which layers of the epidermis would you find mitotically active cells?
    strata basale and spinosum
  48. Lanolin, refined from the lipid secretions of sheep skin, is often used to
    augment humans' holocrine skin secretion called
  49. Which of the following are benign tumors that affect the appearance of the skin?
    • capillary hemangiomas
    • port-wine stains
    • nevi
    • all of the above
  50. A genetic mutation preventing the production of the enzyme tyrosinase would
    result in the condition known as
  51. The most dangerous kind of skin cancer originates from
    melanocytes in an existing mole
  52. Which skin color abnormalities result from alterations in blood contents
    rather than blood flow?
    cyanosis and jaundice
  53. A victim of extensive third-degree burns is at high risk not only from bacterial
    infection but also potentially lethal
  54. "Strawberry-colored birthmarks" are also called
    capillary hemangiomas.
  55. The layer of the epidermis in which cells begin the process of keratinization is
    stratum granulosum.
  56. The sweat glands that communicate with skin surfaces throughout the body, except
    in the axillary, areolar, and anal regions, are
    apocrine glands
  57. Which of the following is not a function of the integument?
    stores calcium in the dermis
  58. Which of the following layers contains areolar connective tissue and dermal
    papillary layer
  59. Melanin is
    a pigment that accumulates inside keratinocytes
  60. A _____ degree burn typically involves the epidermis and part of the dermis. The
    subcutaneous layer is not affected.
  61. The cells in a hair follicle that are responsible for forming hair are the
    matrix cells.
  62. Which epidermal cell type is responsible for detecting touch sensations?
    tactile (Merkel) cell
  63. Water loss due to evaporation of interstitial fluid through the surface of the
    skin is termed
    insensible perspiration