16 Questions
Which type of junction associates with the actin cytoskeleton?
Adherens junctions
Which type of cadherin is associated with neuronal cells?
N-Cadherin
What type of binding is exhibited by cadherins?
Homophilic binding
What ion is required for Cadherin-Cadherin binding?
Ca$^{2+}$
What is the function of claudins in tight junctions?
Form selective channels allowing specific ions to cross the tight-junctional barrier
What is the main transmembrane protein forming the sealing strands in tight junctions?
Claudins
What are the equivalent junctions in insects to tight junctions in vertebrates?
Septate junctions
What is the function of adherens junctions?
Mediate strong cell-cell adhesion and bind to the actin cytoskeleton
What is the function of gap junctions?
Connect the cytoplasms of two cells
What is the pore size of gap junctions?
About 1.4 nm
What proteins form vertebrate gap junctions?
Connexins
What proteins form invertebrate gap junctions?
Innexins
What prevents the flexing of the hinges in cadherins?
Ca2+ ions
Which type of cadherins are homophilic?
Typical Cadherins
What is the role of Fat and Dachsous cadherins?
Planar cell polarity
What is the phenomenon known as the collective alignment of cell polarity across the tissue plane?
Planar cell polarity
Test your knowledge of cell adhesion in epithelial tissues with this quiz based on Lecture 17 of BIOL2020 by Nicanor Arnold Hayer. Explore the concepts of apical-basal polarity, phospholipids, protein complexes, and cytoskeleton in epithelial cells.
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