Gap junction

Definition

A gap junction is a specialized intercellular connection between a multitude of animal cell-types. It directly connects the cytoplasm of two cells, allowing various molecules, ions, and electrical impulses to pass freely between cells.

Related terms

Tight junction: A tight junction is a watertight seal between two adjacent cells that prevents the passage of molecules and ions through the space between those cells.

Desmosome: A desmosome is a structure by which two adjacent cells are attached, formed from protein plaques in the cell membranes linked by filaments.

Intercellular communication: Intercellular communication refers to the interactions between cells that occur either through direct physical contact or through chemical signaling over short or long distances