THE CELL
CELL COMMUNICATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Gap junctions prevent the flow of ions and water from one part of the body to another
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Adhering junctions are branched network of proteins that are impermeable to fluids
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Gap junctions are connections that directly connect the cytoplasm of two cells
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Tight junctions are random, spot attachments between cells that prevent tearing of tissue
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Detailed explanation-1: -Gap junctions are protein channels that span the intercellular space that connect two cells. They allow cytoplasmic exchange in animal cells.
Detailed explanation-2: -Functionally, gap junctions in animal cells are a lot like plasmodesmata in plant cells: they are channels between neighboring cells that allow for the transport of ions, water, and other substances 3. Structurally, however, gap junctions and plasmodesmata are quite different.
Detailed explanation-3: -Tight junctions form a seal between cells that is so strong that not even ions can pass across it. Gap junctions are involved in cellular communication-not just in epithelial tissue, but in other tissue types as well. Gap junctions are specialized connections that form a narrow pore between adjacent cells.
Detailed explanation-4: -Gap junctions allow the exchange of ions, second messengers, and small metabolites between adjacent cells and are formed by two unrelated protein families, the pannexins and connexins.
Detailed explanation-5: -Gap junctions are a type of cell junction in which adjacent cells are connected through protein channels.