12 Questions
What type of junction forms a seal between adjacent cells?
Tight junctions
Which transmembrane glycoprotein is responsible for mediating cell adhesion at adherent junctions?
E-cadherin
What type of junction provides channels for communication between adjacent cells?
Gap junctions
What cytoskeletal feature is associated with adherens junctions at the apical pole of epithelial cells?
Actin filaments
Which protein links cadherins to actin filaments at adherens junctions?
Catenin
What is the main function of desmosomes in epithelial cells?
Cell adhesion
Which structure directly links intermediate filaments to the extracellular matrix?
Hemidesmosomes
What is the primary function of gap junctions?
Mediating intercellular communication
Which type of protein forms the primary structural component of desmosomes?
Cadherins
What is the approximate size limit for molecules that can pass through gap junctions?
$1.5$ nm
Which structure is responsible for anchoring cells to the extracellular matrix via laminin binding?
Hemidesmosomes
Which of the following protein complexes forms a channel for intercellular communication?
Connexons
Test your knowledge on membrane-associated structures that provide adhesion and communication between epithelial cells. Explore the functions of tight junctions, adherent junctions, gap junctions, and desmosomes in cell-to-cell interactions.
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