Layers of the Epidermis Overview
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Questions and Answers

What is the primary function of the Stratum corneum in the epidermis?

  • Modification of keratin content
  • Formation of cornified envelope and desquamation (correct)
  • Cellular division and renewal
  • Maintenance of epidermal homeostasis
  • Which layer of the epidermis contains cells with numerous cytoplasmic processes attached by desmosomes?

  • Stratum granulosum
  • Stratum corneum
  • Stratum spinosum (correct)
  • Stratum basale
  • In skin tissue renewal, what structures are responsible for cell-cell interactions?

  • Hemidesmosomes
  • Corneodesmosomes (correct)
  • Profilaggrin granules
  • Lamellar bodies
  • Which process is associated with tissue repair rather than tissue renewal in the skin?

    <p>Complete regeneration</p> Signup and view all the answers

    Which layer of the epidermis is primarily responsible for mitotically dividing small cuboidal stem cells?

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

    What distinguishes the Stratum granulosum from other epidermal layers?

    <p>Presence of lamellar bodies and profilaggrin granules</p> Signup and view all the answers

    What is the renewal rate of hepatocytes?

    <p>1 year</p> Signup and view all the answers

    Which of the following cell types show very limited or almost no cellular turnover?

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

    In tissue homeostasis, which cells have low cellular turnover except in cases of injury?

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

    Which tissue has a renewal rate of 5 days for its epithelium?

    <p>Small intestine</p> Signup and view all the answers

    What is the primary function of the dermis in the skin structure?

    <p>Providing mechanical strength</p> Signup and view all the answers

    Which of the following cells are exceptions and can undergo differentiated cell division?

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

    What is the key cellular event that occurs during re-epithelialization in skin wound healing?

    <p>Proliferation and migration of stem cells</p> Signup and view all the answers

    In which phase of skin wound healing do myofibroblasts play a significant role?

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

    Which type of renewal involves complete regeneration similar to that observed during development?

    <p>Tissue renewal</p> Signup and view all the answers

    What is the primary function of macrogphages in the skin wound healing process?

    <p>Removal of cellular debris and resolution of inflammation</p> Signup and view all the answers

    Which process leads to avascular and acellular wound with collagen type I deposition in skin wound healing?

    <p>Granulation tissue formation</p> Signup and view all the answers

    What is the primary function of myofibroblasts in skin wound healing?

    <p>Contraction to pull wound margins together</p> Signup and view all the answers

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