Cell Junctions: Tight Junctions Quiz

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What is the main function of hemidesmosomes?

Connect cells to each other

Facilitate communication between neighboring cells

Anchor cells to the basement membrane (correct)

Synthesize proteins for cell adhesion

How many connexin protein molecules form a hemichannel in the structure of gap junctions?

6 (correct)

4

8

10

What transmembrane glycoproteins are present in hemidesmosomes?

Collagens

Laminins

Connexins

Integrins (correct)

Which type of junction is responsible for connecting epithelial cells to each other?

Desmosomes Signup and view all the answers

What is the primary function of the basement membrane?

Connect epithelial tissue to connective tissue Signup and view all the answers

Which structure contains collagen produced by fibroblasts in close proximity to connective tissue?

Lamina reticularis Signup and view all the answers

'Connecting neighboring cells' is a function associated with:

Gap junctions Signup and view all the answers

'Anchoring cells to the basement membrane' is a role carried out by:

Desmosomes Signup and view all the answers

What is the main function of tight junctions?

Blocking intercellular movement of small solutes Signup and view all the answers

Which proteins are mainly responsible for forming tight junctions?

Occludins and claudins Signup and view all the answers

Where are tight junctions predominantly found in the body?

Stomach, intestine, and bladder Signup and view all the answers

What is the main function of adherens junctions?

Preventing cell separation during contraction Signup and view all the answers

Which type of junction keeps cell polarity by preventing migration of proteins between apical and basal surfaces?

Tight junctions Signup and view all the answers

What does the presence of adhesion plaques indicate?

Absence of tight junctions Signup and view all the answers

Which type of junction is located more towards the basal surface of epithelium cells?

Adherens junctions Signup and view all the answers

What is the role of desmosomes in cell-cell adhesion?

Preventing cell separation under mechanical stress Signup and view all the answers

What are the cell junctions that hold epithelial cells together?

Desmosomes Signup and view all the answers

Which type of cell junction is responsible for providing communication channels between adjacent cells?

Gap junctions Signup and view all the answers

Which cell junction provides mechanical strength and connects epithelial cells to the basement membrane?

Hemidesmosomes Signup and view all the answers

Which type of cell junction is involved in the selective passage of molecules through epithelial layers?

Tight junctions Signup and view all the answers

Which cell junction is essential for cell-cell adhesion and regulation of cell shape and movement?

Adherens junctions Signup and view all the answers

Which type of cell junction serves as a physical barrier to prevent leakage in between epithelial cells?

Zonula occludens Signup and view all the answers

Which type of cell junction aids in quick communication between cells by allowing fast passage of small molecules?

Connexin gap junctions Signup and view all the answers

Which cell junction plays a role in attaching actin filaments to the cell membrane and is important for tissue integrity?

Actin-binding junctions Signup and view all the answers

What type of junction connects the cytoskeleton of neighboring cells, providing strong adhesion between them?

Desmosomes Signup and view all the answers

Which junction forms a seal around the cell to prevent molecules from passing between cells?

Tight junctions Signup and view all the answers

What type of junction allows for the direct passage of ions and small molecules from one cell to another?

Gap junctions Signup and view all the answers

Which junction anchors epithelial cells to the basement membrane?

Hemidesmosomes Signup and view all the answers

What type of junction is responsible for connecting actin filaments between adjacent cells?

Adherens junctions Signup and view all the answers

When considering cell-cell communication, which junction is involved in signaling pathways between cells?

Gap junctions Signup and view all the answers

Which type of junction consists of cadherin proteins binding adjacent cells together?

Adherens junctions Signup and view all the answers

In terms of structural support, which type of junction provides a spot weld-like connection between cells?

Desmosomes Signup and view all the answers

What proteins are involved in the adherens junction?

Cadherins and catenins Signup and view all the answers

What is responsible for locking cadherin to the microfilament in the cell cytoplasm in an adherens junction?

Catenins Signup and view all the answers

Where are desmosomes typically found?

In the lateral wall of epithelial and cardiac tissue Signup and view all the answers

What do gap junctions allow to pass through them?

1 kDa molecules Signup and view all the answers

Which protein spans the gap between cell walls and binds to desmoplakin in a desmosome junction?

Cadherin Signup and view all the answers

What is the main function of tight junctions?

To provide structural integrity to cells Signup and view all the answers

Cell Junctions: Tight Junctions Quiz

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Questions and Answers

What is the main function of hemidesmosomes?

How many connexin protein molecules form a hemichannel in the structure of gap junctions?

What transmembrane glycoproteins are present in hemidesmosomes?

Which type of junction is responsible for connecting epithelial cells to each other?

What is the primary function of the basement membrane?

Which structure contains collagen produced by fibroblasts in close proximity to connective tissue?

'Connecting neighboring cells' is a function associated with:

'Anchoring cells to the basement membrane' is a role carried out by:

What is the main function of tight junctions?

Which proteins are mainly responsible for forming tight junctions?

Where are tight junctions predominantly found in the body?

What is the main function of adherens junctions?

Which type of junction keeps cell polarity by preventing migration of proteins between apical and basal surfaces?

What does the presence of adhesion plaques indicate?

Which type of junction is located more towards the basal surface of epithelium cells?

What is the role of desmosomes in cell-cell adhesion?

What are the cell junctions that hold epithelial cells together?

Which type of cell junction is responsible for providing communication channels between adjacent cells?

Which cell junction provides mechanical strength and connects epithelial cells to the basement membrane?

Which type of cell junction is involved in the selective passage of molecules through epithelial layers?

Which cell junction is essential for cell-cell adhesion and regulation of cell shape and movement?

Which type of cell junction serves as a physical barrier to prevent leakage in between epithelial cells?

Which type of cell junction aids in quick communication between cells by allowing fast passage of small molecules?

Which cell junction plays a role in attaching actin filaments to the cell membrane and is important for tissue integrity?

What type of junction connects the cytoskeleton of neighboring cells, providing strong adhesion between them?

Which junction forms a seal around the cell to prevent molecules from passing between cells?

What type of junction allows for the direct passage of ions and small molecules from one cell to another?

Which junction anchors epithelial cells to the basement membrane?

What type of junction is responsible for connecting actin filaments between adjacent cells?

When considering cell-cell communication, which junction is involved in signaling pathways between cells?

Which type of junction consists of cadherin proteins binding adjacent cells together?

In terms of structural support, which type of junction provides a spot weld-like connection between cells?

What proteins are involved in the adherens junction?

What is responsible for locking cadherin to the microfilament in the cell cytoplasm in an adherens junction?

Where are desmosomes typically found?

What do gap junctions allow to pass through them?

Which protein spans the gap between cell walls and binds to desmoplakin in a desmosome junction?

What is the main function of tight junctions?

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