Epithelium Junctional Complexes Quiz
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Questions and Answers

What type of junction forms a seal between adjacent cells?

  • Desmosome
  • Tight junctions (correct)
  • Adherent junctions
  • Gap junctions

Which transmembrane glycoprotein is responsible for mediating cell adhesion at adherent junctions?

  • Integrin
  • E-cadherin (correct)
  • Occludin
  • Claudin

What type of junction provides channels for communication between adjacent cells?

  • Desmosomes
  • Gap junctions (correct)
  • Adherent junctions
  • Tight junctions

What cytoskeletal feature is associated with adherens junctions at the apical pole of epithelial cells?

<p>Actin filaments (B)</p> Signup and view all the answers

Which protein links cadherins to actin filaments at adherens junctions?

<p>Catenin (B)</p> Signup and view all the answers

What is the main function of desmosomes in epithelial cells?

<p>Cell adhesion (D)</p> Signup and view all the answers

Which structure directly links intermediate filaments to the extracellular matrix?

<p>Hemidesmosomes (C)</p> Signup and view all the answers

What is the primary function of gap junctions?

<p>Mediating intercellular communication (C)</p> Signup and view all the answers

Which type of protein forms the primary structural component of desmosomes?

<p>Cadherins (A)</p> Signup and view all the answers

What is the approximate size limit for molecules that can pass through gap junctions?

<p>$1.5$ nm (A)</p> Signup and view all the answers

Which structure is responsible for anchoring cells to the extracellular matrix via laminin binding?

<p>Hemidesmosomes (D)</p> Signup and view all the answers

Which of the following protein complexes forms a channel for intercellular communication?

<p>Connexons (D)</p> Signup and view all the answers

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