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Epithelial Tissue Cell Adhesion Quiz

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Questions and Answers

Which type of junction associates with the actin cytoskeleton?

Adherens junctions (correct)

Tight junctions

Desmosomes

Gap junctions

Which type of cadherin is associated with neuronal cells?

P-cadherin

N-Cadherin (correct)

E-cadherin

R-cadherin

What type of binding is exhibited by cadherins?

Ionic binding

Homophilic binding (correct)

Covalent binding

Heterophilic binding

What ion is required for Cadherin-Cadherin binding?

Ca$^{2+}$ Signup and view all the answers

What is the function of claudins in tight junctions?

Form selective channels allowing specific ions to cross the tight-junctional barrier Signup and view all the answers

What is the main transmembrane protein forming the sealing strands in tight junctions?

Claudins Signup and view all the answers

What are the equivalent junctions in insects to tight junctions in vertebrates?

Septate junctions Signup and view all the answers

What is the function of adherens junctions?

Mediate strong cell-cell adhesion and bind to the actin cytoskeleton Signup and view all the answers

What is the function of gap junctions?

Connect the cytoplasms of two cells Signup and view all the answers

What is the pore size of gap junctions?

About 1.4 nm Signup and view all the answers

What proteins form vertebrate gap junctions?

Connexins Signup and view all the answers

What proteins form invertebrate gap junctions?

Innexins Signup and view all the answers

What prevents the flexing of the hinges in cadherins?

Ca2+ ions Signup and view all the answers

Which type of cadherins are homophilic?

Typical Cadherins Signup and view all the answers

What is the role of Fat and Dachsous cadherins?

Planar cell polarity Signup and view all the answers

What is the phenomenon known as the collective alignment of cell polarity across the tissue plane?