The main function of a gap junction is to allow the transmission of electrical impulses among cells. These transmissions come from neighboring cells and they would not be able to communicate without a gap junction.
A gap junction is a '' tunnel '' between cells in which messages and nutrients can be passed back and forth. A tight junction is the connection between two cells that is strongly '' sown '' with protein threads to… Full Answer
Tight junction - impermeable junction that encircles the cell Desmosome - anchoring junction scattered along the sides of cells Gap junction - a nexus that allows chemical substances to pass between cells