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The Basal Lamina quiz

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  • What is the primary function of the Basal Lamina beneath epithelial cells?
    The Basal Lamina provides structural support and acts as a foundation for epithelial cells.
  • Which two main proteins compose the Basal Lamina?
    The Basal Lamina is composed of laminin and type 4 collagen.
  • How does laminin contribute to the Basal Lamina's structure?
    Laminin binds to the plasma membrane and helps organize the matrix by connecting to collagen.
  • What role does type 4 collagen play in the Basal Lamina?
    Type 4 collagen provides strength and forms a rope-like matrix with laminin.
  • Is the Basal Lamina the same as the basement membrane?
    No, the Basal Lamina is a component of the basement membrane, not the entire structure.
  • What is the typical thickness range of the Basal Lamina?
    The Basal Lamina is 40 to 120 nanometers thick.
  • On which side of epithelial cells is the Basal Lamina located?
    The Basal Lamina is located on the basal side of epithelial cells.
  • What is the shape of laminin proteins in the Basal Lamina?
    Laminin proteins have a trident-like shape.
  • Which protein is most abundant in the human body and is found in the Basal Lamina?
    Collagen is the most abundant protein in the body, specifically type 4 collagen in the Basal Lamina.
  • What is the main function of the Basal Lamina in kidney cells?
    In kidney cells, the Basal Lamina acts as an impermeable barrier to prevent mixing of waste and blood products.
  • How does the Basal Lamina support neurons?
    It provides extra support to ensure proper synapse formation between neurons.
  • What type of cells, besides epithelial cells, commonly have a Basal Lamina?
    Muscle, fat, Schwann cells, neurons, and kidney cells also have a Basal Lamina.
  • What are integrin proteins and their role in the Basal Lamina?
    Integrin proteins help laminin adhere to the plasma membrane of the cell.
  • What is the relationship between laminin and collagen in the Basal Lamina?
    Laminin binds to collagen type 4, forming a rope-like matrix for structural support.
  • Why is the Basal Lamina only visible under a microscope?
    Because its thickness is only 40 to 120 nanometers, making it too small to see with the naked eye.