The dermis contains blood vessels and nerve fibers while the epidermis does not

Question

The dermis contains blood vessels and nerve fibers while the epidermis does not For a doctor, simply looking at a patient's skin can help in making a diagnosis. When an individuals is exposed to extremely cold air the dermal blood vessels will dilated that more blood will be brought closer to the outside surface of the skin. Regardless of race, all human beings have about the same number of melanocytes. The pinkish hue of individuals with fair skin is the result of the crimson color of oxygen hemoglobin (contained in red cells) circulating in the dermal capillaries and reflection through the epidermis. Multiple Choice Questions 61) The major regions of a hair shaft include all of

Explanation / Answer

53. True

54. True

55. False

56. True

57. True

58. False (level of severity)

59. False

60. True

61. A. External root sheath (present outside the epidermis)

62. D. overexposure to UV radiation (destroy melanin pigments)

63. D. Tactile corpuscle

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