Question

Write the cell junction and explain cell junction types

Answer 1

A cell junction (or intercellular bridge[1]) is a type of structure that exists within the tissue of some multicellular organisms, such as animals. Cell junctions consist of multiprotein complexes that provide contact between neighboring cells or between a cell and the extracellular matrix. They also build up the paracellular barrier of epithelia and control the paracellular transport. Cell junctions are especially abundant in epithelial tissues.

Cell junctions are especially important in enabling communication between neighboring cells via specialized proteins called communicating junctions. Cell junctions are also important in reducing stress placed upon cells.

Combined with CAMs and ECM, cell junctions help hold animal cells together.

Answer 2

Cell junctions refers to the structural and fundamental links between the individual cells especially in epithelial tissue.

1. Interdigitation:- These are the finger like projections in the plasma Membrane that occurs in the cytoplasm of adjacent cells.

2. Gap junctions:- These helps to facilitate the communication process between the adjoining cells for easier transportation of ions, chemicals, nutrients etc.

3. Adhering junctions:- These perform the cementing work that holds and keeps all the cells together.

4. Tight junctions:- These help in stoppage of substances from leaking to other cells.