Gap junctions Flashcards
—places where cells attach other cells of cells attach to the extracellular
matrix
Cell junctions
Cell junctions contain a variety of
cell adhesion molecules (CAMs) – membrane-spanning proteins that allow attachment to other cells
communicating junctions
Gap junctions
occluding junctions
tight junction
Regulate paracellular transport pathway – Two types of cell-cell junctions that contain cadherins
▪ Adherens junctions
▪ Desmosomes – Cell-matrix junctions that contain integrins
▪ Hemidesmosomes
▪ Focal adhesion
anchoring junctions
anchoring junctions
Regulate paracellular transport pathway – Two types of cell-cell junctions that contain cadherins
▪ Adherens junctions
▪ Desmosomes – Cell-matrix junctions that contain integrins
▪ Hemidesmosomes
▪ Focal adhesion
2 types of anchoring junstions
desmosomes, hemidesmosome
adherins junstions
desmosome
focal adhesions
hemidesmosomes
Connexons
embedded proteins
permit
the free diffusion of
ions and small
molecules between
two cells
made up of proteins called connexons
gap junctions
attach a cell
to extracellular structures, such
as the protein fibers in the
basement membrane
hemidesmosomes
Things dont pass easily though this,
prevent things from entering from the edges of the cells. (paracellular pathways)Preve
tight junctions
allow for attachment. Examples of transmembrane proteins. Pass through membrane and are found on both surfaces
cell adhesion molecules