The Skin
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Questions and Answers

What is the main function of keratin produced by keratinocytes in the epidermis?

  • Facilitate diffusion of nutrients
  • Provide hardness and make skin waterproof (correct)
  • Produce melanin for skin pigmentation
  • Initiate immune response to protect the skin

    • Which layer of the skin contains no blood vessels and is nourished by diffusion of nutrients from the underlying dermis?

  • Dermis
  • Epidermis (correct)
  • Hypodermis
  • Stratum corneum

    • What is the main function of melanin produced by melanocytes in the epidermis?

  • Provide protection against UV radiation (correct)
  • Initiate immune response to protect the skin
  • Produce keratin for skin hardness
  • Facilitate diffusion of nutrients

    • Which type of cell in the epidermis is responsible for initiating an immune response to protect the skin?

    <p>Langerhans cells</p> Signup and view all the answers

    What is the approximate percentage of the total body weight that the skin constitutes in humans?

    <p>12-15%</p> Signup and view all the answers

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