Types of juntions

 Spot Desmosomes 

between two cells (like a localized button)

Function: fasten adjacent cells together and link the intracellular keratin to distribute stress 

Hemidesmosomes 

Between a cell and the basement membrane  

Function: anchor basal epithelial cells to the underlying basement membrane 

Tight junctions 

 between plasma membranes of neighboring cells 

Function: prevent water and solutes from passing between cells 

Gap junctions 

Formed by channel proteins call connexions  

Function: allow rapid communication as ions and small molecules pass