18 Questions
Where are tight junctions typically located in small intestinal epithelial cells?
At the apical part of the cells
What is the main function of tight junctions?
To create an impenetrable seal between the cells
What type of proteins stabilize tight junctions?
Occludin proteins
Which technique is used to visualize tight junctions?
Transmission electron microscopy
What is the function of anchoring junctions?
To provide minimal adhesive strength between cells
Where are anchoring junctions located in intestinal epithelial cells?
Below the tight junctions
What type of cell-cell junction is involved in the interaction between white blood cells and capillary endothelial cells?
Transient junctions
Which type of junction is responsible for holding cells together?
Anchoring junctions
What type of protein is involved in the interaction between white blood cells and capillary endothelial cells?
All of the above
What is the function of gap junctions?
To allow for communication between cells
What is the name of the type of anchoring junction that is associated with intermediate filaments?
Macula adherens
What is the term for the process of white blood cells passing through the capillary wall?
Extravasation
What is a consequence of losing E-cadherin expression in epithelial cells?
Metastasis formation of cancers
What type of junctions are formed by actin microfilament-associated proteins?
Zonula adherens
What is the name of the autoimmune disease that is characterized by the formation of autoantibodies against cadherin proteins?
Pemphigus
What is the primary function of gap junctions?
To permit direct transfer of ions and small molecules
What is the name of the type of junction that is characterized by a tight seal between cells?
Tight junction
What type of filaments are associated with macula adherens?
Intermediate filaments
This quiz covers the types of cell-cell junctions, including transient, stable, occluding, anchoring, and communicating junctions. Learn about zonula occludens, zonula adherens, macula adherens, and gap junctions in medical biology.
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