Epithelium

What is the correct sequence for preparing histology slides?

• Fixation, Clearing, Infiltration, Dehydration, Sectioning, Staining

• Fixation, Dehydration, Clearing, Infiltration, embedding Sectioning, Staining

• Dehydration, Fixation, Clearing, Infiltration, embedding Sectioning, Staining

• Clearing, Fixation, Dehydration, Infiltration, Sectioning, Staining

What is the purpose of the fixing step?

• To remove contaminants from biological samples.
• To enhance the color of biological samples.
• To stabilize and preserve biological samples.
• To increase the size of biological samples.

Which is not a hallmark of epithelium?

• Presence of tight junctions
• Presence of significant extracellular matrix
• No blood supply

• Ability to regenerate quickly

What type of epithelium is this?

• Pseudostratified columnar epithelium
• Stratified squamous epithelium
• Simple cuboidal epithelium
• Transitional epithelium

What type of epithelium is this?

• Stratified squamous epithelium
• Pseudostratified columnar epithelium
• Transitional epithelium
• Simple cuboidal epithelium

What is the primary function of tight junctions in epithelial cells?

• Allow free movement of molecules between cells

• Prevent the passage of molecules and ions between adjacent cells

• Provide structural support to the cell

• Facilitate rapid communication between cells

Choose a friend to help explain tight junctions.

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What is the primary function of anchoring junctions?

• Prevent the passage of molecules between cells

• Facilitate electrical signaling between cells

• Provide mechanical stability by linking cells to each other or to the extracellular matrix

• Allow free movement of ions and small molecules

Choose a friend to help explain adherens junction.

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Which of the following is a key difference between desmosomes and adherens junctions?

• Desmosomes use cadherins, while adherens junctions use integrins

• Desmosomes connect actin filaments, while adherens junctions connect intermediate filaments

• Desmosomes connect intermediate filaments, while adherens junctions connect actin filaments

• There is no significant difference between them