Identify the types of cell junctions that help to stop the leakage of the substances across a tissue and facilitation of communication with neighboring cells via rapid transfer of ions and molecules
Adhering junctions and Gap junctions, respectively
Gap junctions and Adhering junctions, respectively
Tight junctions and Gap junctions, respectively
Adhering junctions and Tight junctions, respectively
The Correct Option is C
Solution and Explanation
To identify the types of cell junctions that meet the requirements specified in the question, it's essential to understand the functions of different cell junctions:
- Tight Junctions: These are specialized connections between adjacent cells that form a barrier to prevent the leakage of substances across tissues. They play a crucial role in maintaining the polarity of cells by segregating their apical and basolateral sides.
- Gap Junctions: These junctions facilitate communication between neighboring cells by allowing the rapid transfer of ions and small molecules. They form channels that connect the cytoplasm of adjacent cells, enabling cellular communication and coordination.
- Adhering Junctions (Adherens Junctions): These junctions help in maintaining the mechanical stability of tissues by binding the cytoskeleton of one cell to the cytoskeleton of another. They are not primarily involved in stopping leakage or facilitating rapid communication.
From the explanations above, it can be concluded that:
- Tight Junctions are responsible for stopping the leakage of substances across tissues.
- Gap Junctions are responsible for the rapid transfer of ions and molecules, thus facilitating communication between neighboring cells.
Therefore, the correct option is: Tight junctions and Gap junctions, respectively.
Let's evaluate the options:
- Adhering junctions and Gap junctions, respectively: Adhering junctions are not primarily for stopping leakage. This option is incorrect.
- Gap junctions and Adhering junctions, respectively: Gap junctions are for communication, not for stopping leakage. This option is incorrect.
- Tight junctions and Gap junctions, respectively: Correct. Tight junctions prevent leakage and Gap junctions facilitate communication.
- Adhering junctions and Tight junctions, respectively: Incorrect order and reasoning.
Hence, the final solution is: Tight junctions and Gap junctions, respectively.
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