Skin Anatomy: Stratum Basale and Stratum Spinosum
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Questions and Answers

What is the primary function of the cells in the Stratum Basale?

  • To synthesize keratin filaments that form tonofilaments
  • To produce keratohyalin granules
  • To serve as stem cells, capable of renewal and producing other cell types (correct)
  • To form bundles of tonofilaments that maintain cohesion between cells
  • Which layer of the epidermis is characterized by the presence of raised projections called dermal papillae?

  • Stratum Basale
  • Reticular Layer
  • Stratum Granulosum (correct)
  • Stratum Spinosum
  • What is the primary function of tonofilaments in the Stratum Spinosum?

  • To regulate osmoregulation
  • To form keratohyalin granules
  • To synthesize keratin filaments
  • To maintain cohesion between cells (correct)
  • Which layer of the epidermis is responsible for mechanical protection?

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

    What is the primary component of the Reticular Layer?

    <p>Dense irregular connective tissue fibers</p> Signup and view all the answers

    What is the final product of the combination of keratohyalin granules and keratin tonofilaments in the Stratum Granulosum?

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

    What is the characteristic of the cells in the Stratum Corneum?

    <p>They lack nuclei and organelles and are flattened and dead.</p> Signup and view all the answers

    Where are the melanocytes located?

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

    What is the function of Langerhans cells?

    <p>To act as antigen presenting cells</p> Signup and view all the answers

    What is the function of Merkel's cells?

    <p>To detect pressure</p> Signup and view all the answers

    In which skin type is the Stratum Lucidum not found?

    <p>Thin skin</p> Signup and view all the answers

    What is the characteristic of the Stratum Lucidum?

    <p>It contains dead cells without nuclei</p> Signup and view all the answers

    What is the primary function of the skin in regards to vitamin D?

    <p>Vitamin D metabolism</p> Signup and view all the answers

    Which of the following layers is absent in thin skin?

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

    What is the main difference between thick and thin skin?

    <p>Thickness of the epidermal layer</p> Signup and view all the answers

    Which skin layer is responsible for mechanical protection?

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

    What is the function of the skin in regards to osmoregulation?

    <p>Maintenance of fluid balance</p> Signup and view all the answers

    Which of the following is NOT a characteristic of thick skin?

    <p>Presence of sebaceous glands</p> Signup and view all the answers

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