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Types of Cell Junctions in General Biology

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이 집합의 용어 (20)

  • What is the primary function of tight junctions?

    Tight junctions prevent leakage between cells by sealing adjacent cell membranes tightly together.

  • What role do desmosomes play in cell structure?

    Desmosomes, also called anchor junctions, provide strong adhesion between cells using intermediate filaments.

  • How do gap junctions facilitate cell communication?

    Gap junctions allow the flow of ions and small molecules directly between adjacent cells for communication.

  • What are plasmodesmata and where are they found?

    Plasmodesmata are channels that connect plant cells, enabling communication and transport of materials.

  • Which type of cell junction prevents material leakage between cells?

    Tight junctions prevent leakage by creating a seal between adjacent cells.

  • Which cell junction uses intermediate filaments for strong adhesion?

    Desmosomes use intermediate filaments to anchor cells together strongly.

  • What passes through gap junctions between cells?

    Ions and small molecules pass through gap junctions to facilitate intercellular communication.

  • How do plasmodesmata differ from gap junctions?

    Plasmodesmata are plant cell channels, while gap junctions are found in animal cells; both allow intercellular transport.

  • Why are desmosomes important for tissue integrity?

    Desmosomes provide mechanical strength by anchoring cells together, maintaining tissue stability.

  • Which cell junction type is primarily involved in communication rather than adhesion?

    Gap junctions primarily facilitate communication by allowing molecule exchange between cells.

  • What structural feature characterizes tight junctions?

    Tight junctions form a continuous seal around cells to block passage of substances.

  • In plants, what structure replaces gap junctions for cell communication?

    Plasmodesmata serve as channels for communication and transport between plant cells.

  • What type of filaments do desmosomes use to connect cells?

    Desmosomes use intermediate filaments to connect the cytoskeletons of adjacent cells.

  • How do tight junctions contribute to tissue function?

    By preventing leakage, tight junctions help maintain distinct environments on either side of a tissue layer.

  • What is the main difference between desmosomes and tight junctions?

    Desmosomes provide strong adhesion; tight junctions create a seal to prevent leakage.

  • Which cell junction type allows direct cytoplasmic exchange?

    Gap junctions allow direct exchange of ions and small molecules through channels.

  • What is the function of plasmodesmata in plant cells?

    Plasmodesmata enable transport and communication by connecting the cytoplasm of adjacent plant cells.

  • How do intermediate filaments contribute to desmosome function?

    Intermediate filaments provide structural support, anchoring desmosomes to the cell's cytoskeleton.

  • Which cell junction type is essential for maintaining selective barriers in tissues?

    Tight junctions maintain selective barriers by sealing spaces between cells.

  • What types of molecules can pass through gap junctions?

    Small molecules and ions can pass through gap junctions to facilitate cell signaling.