Which cell-cell junctions are typically found in electron microscopy?

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Prepare for the Epithelial Tissue Structure and Function Test. Explore with multiple choice questions and explanations. Master epithelial tissue concepts for your exam success!

Multiple Choice

Which cell-cell junctions are typically found in electron microscopy?

Explanation:
Electron microscopy can reveal the ultrastructure of the main cell‑cell junctions: tight junctions (zonula occludens) create a seal at the apical border; adherens junctions (zonula adherens) form a belt-like connection just below the tight junctions linking the actin cytoskeletons; and desmosomes (macula adherens) appear as spot attachments that anchor intermediate filaments between cells. Because all three types have distinct ultrastructural features visible with EM, the correct choice is that all of them are typically seen.

Electron microscopy can reveal the ultrastructure of the main cell‑cell junctions: tight junctions (zonula occludens) create a seal at the apical border; adherens junctions (zonula adherens) form a belt-like connection just below the tight junctions linking the actin cytoskeletons; and desmosomes (macula adherens) appear as spot attachments that anchor intermediate filaments between cells. Because all three types have distinct ultrastructural features visible with EM, the correct choice is that all of them are typically seen.

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