Epidermal Layers
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Questions and Answers

Which layer of the epidermis is the most superficial?

  • Stratum granulosum
  • Stratum corneum (correct)
  • Stratum spinosum
  • Stratum lucidum
  • What is the main function of the Stratum corneum?

  • Barrier to heat
  • Barrier to bacteria
  • Barrier to water
  • Barrier to light (correct)
  • What makes the Stratum corneum water-repellent?

  • Lipids
  • Keratin
  • Keratinocytes
  • Lamellar granules (correct)
  • What happens to the Stratum corneum when exposed to constant friction?

    <p>It increases in depth</p> Signup and view all the answers

    Which layer of the epidermis is responsible for impermeable protection?

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

    Which layer of the epidermis is found only in thick skin?

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

    Which layer of the epidermis is known as Malpighi's layer?

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

    Which layer of the epidermis is the deepest?

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

    What is the main function of the Stratum granulosum?

    <p>Water-repellency</p> Signup and view all the answers

    What is the main function of the Stratum basale?

    <p>Cellular proliferation</p> Signup and view all the answers

    Which layer of the epidermis is responsible for providing strength and flexibility to the skin?

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

    Which layer of the epidermis is ONLY present in thick skin, such as the palms of the hands and soles of the feet?

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

    Which layer of the epidermis is the deepest and contains cuboidal cells, as well as Merkel cells, Langerhans cells, and melanocytes?

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

    Which layer of the epidermis contains 3-5 layers of flat keratinocytes and acts as a physical barrier to microorganisms?

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

    Which layer of the epidermis contains keratinocytes with lamellar granules that repel water?

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

    Which layer of the epidermis contains dead keratinocytes without a nucleus and is ONLY present in thick skin?

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

    Which layer of the epidermis is responsible for germinative proliferation and has a high proliferation rate of stem cells?

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

    Which layer of the epidermis contains keratinocytes that appear spiny in histological preparations and are rounded and big in live skin?

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

    Which layer of the epidermis contains cells that degenerate and die in the top layers and prevent water loss?

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

    Which layer of the epidermis is required for skin grafts to be successful?

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

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