MNSR Integument: Skin Histology and Function
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Questions and Answers

What is the main function of the stratum basale layer?

  • To produce keratin
  • To provide a germinal layer for cell division (correct)
  • To allow skin shedding
  • To regulate skin pigmentation

    • What is the main component of the stratum corneum?

  • Columnar or cuboidal cells
  • Granules within the cells
  • Flattened fused cell remnants composed of keratin (correct)
  • Living cells with nuclei

    • What is the approximate duration of the entire epidermal cycle in humans?

  • 30 days
  • 21 days
  • 27 days (correct)
  • 14 days

    • What is the layer of the epidermis where cells start to lay down keratin?

    <p>Stratum spinosum</p> Signup and view all the answers

    What is the factor responsible for the inherent yellowish color of human skin?

    <p>Carotene in the subcutaneous fat</p> Signup and view all the answers

    What is the layer of the epidermis that is only present in thick skin?

    <p>Stratum lucidum</p> Signup and view all the answers

    What percentage of a normal person's mass is made up of skin?

    <p>12-16%</p> Signup and view all the answers

    What is the outermost layer of the skin composed of?

    <p>Stratified squamous epithelium</p> Signup and view all the answers

    What is the function of sebum, a secretion from the sebaceous glands?

    <p>To waterproof the skin</p> Signup and view all the answers

    What is the layer of skin below the dermis composed of?

    <p>Loose connective tissue</p> Signup and view all the answers

    What protein is present in the epidermis and gives rise to several structures such as hair, nails, hooves, and horns?

    <p>Keratin</p> Signup and view all the answers

    What is the process by which the epidermis undergoes change to form the surface layer (corneum)?

    <p>Keratinization</p> Signup and view all the answers

    What is one of the primary functions of the skin?

    <p>Protection against physical trauma</p> Signup and view all the answers

    What is the outermost layer of the skin responsible for?

    <p>Protection against UV light</p> Signup and view all the answers

    What is the role of hair in thermoregulation?

    <p>It provides insulation and plays a major role in temperature regulation</p> Signup and view all the answers

    What is the skin responsible for in terms of sensation?

    <p>Allowing interpretation of the external environment</p> Signup and view all the answers

    What is the role of melanin in the skin?

    <p>Protection against UV light</p> Signup and view all the answers

    What is the skin responsible for in terms of metabolism?

    <p>Producing vitamin D used in calcium and phosphate metabolism</p> Signup and view all the answers

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