Identify the types of cell junctions that help to stop the leakage of the substances across a tissue and facilitation of communication with neighbouring 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
Answer
(3) Tight junctions and Gap junctions, respectively
Solution
As per NCERT, cell junctions in epithelium and other tissues are of three types:
⇒ Tight junctions help to stop substances from leaking across a tissue.
⇒ Adhering junctions perform cementing to keep neighbouring cells together.
⇒ Gap junctions facilitate communication between cells by connecting the cytoplasm of adjoining cells, for rapid transfer of ions, small molecules and sometimes big molecules.
∴ Tight junctions and Gap junctions, respectively.
Answer: (3)