Question

Epithelial cells in animals are held by specialized junctions, one of them being "Gap junction". Function of a "Gap junction" is to ____________.

• A. facilitate cell-cell communication by rapid transfer of small molecules
• B. cement the neighbouring cells
• C. stop substance from leaking
• D. provide gaps in the tissue to facilitate uptake of small molecules across tissues

Answer 1

The correct option is A facilitate cell-cell communication by rapid transfer of small molecules

A. Facilitate cell to cell communication by rapid transfer of small molecules

Reason : The cell junction is present in the epithelium. It contains a multiprotein complex that provides adhesion between neighboring cells or between a cell. It is also controlled paracellular transport. One of the cell junction is gap junction. These are cytoplasmic communications between two epithelial cells and act as a portal for the rapid transfer of some ions and small molecules.

So the correct option is A.