Zonula occuludens: Tight junctions that act as a barrier, preventing water and ions from passing
The cytoskeleton protein that makes up the zonula occludens are actin filaments.
Zonula Adherens: A intermediate junction that keeps cells from being pulled apart.
This can be seen through cardiac muscle, where a tear could be catastrophic.
Gap Junctions: Regulated channels that allow small molecules and ions to pass through
Gap junctions use connexin in conjunction with complex AP-2.
Cellular Biology Business 