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Related Experiment Videos

Septate junctions in insects: comparison between intercellular and intramembranous structures.

C Noirot-Timothée, D S Smith, M L Cayer

    Tissue & Cell
    |January 1, 1978
    PubMed
    Summary
    This summary is machine-generated.

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    Septate junctions in insect hind-guts provide a barrier, similar to vertebrate tight junctions. Their structure, though variable, ensures cell adhesion and regulates permeability.

    Area of Science:

    • Cell Biology
    • Insect Physiology
    • Epithelial Biology

    Background:

    • Septate junctions are crucial for invertebrate epithelial function.
    • Their structural organization and role in permeability are not fully understood.

    Purpose of the Study:

    • To investigate the structure and function of septate junctions in insect hind-guts.
    • To compare septate junction morphology with permeability barrier function.

    Main Methods:

    • Lanthanum impregnation to visualize intercellular septa.
    • Freeze-fracture electron microscopy to observe particle rows.

    Main Results:

    • Topographical disposition of septa correlates with particle rows.
    • No precise correspondence between septal undulations and particle arrangement.

    Related Experiment Videos

  • Septa are not continuous ribbons and show interruptions.
  • Septate junctions form a permeability barrier.

    • Conclusions:

    • Septate junctions in insect hind-guts provide mechanical cohesion and a permeability barrier.
    • Their role is comparable to vertebrate tight junctions.