Cell adhesion and cell junctions Flashcards
What are the four main tissue types?
Epithelia
Connective
Nervous
Muscle
As you move from epithelial tissue to connective tissue, what happens to the amount of collagen?
It increases
As you move from epithelial tissue to connective tissue, what happens to the amount of cells?
decrease
As you move from the epithelial tissue to connective tissue, what happens to the amount of matrix?
It increases
In epithelial tissue, extracellular matrix is only found at the bottom of the basal layer. True or false?
True
What are the three major groups that cell junctions can be classified into?
Occluding junctions
Anchoring junctions
Communicating junctions
Tight junctions are an example of which major group of cell junctions?
Occluding junctions
Actin filaments e.g. adhesion belt is an example of which major group of cell junction?
Anchoring junctions
What are cadherins?
Calcium dependent adherent proteins
Actin filaments and adhesion belt are important in developmental processes. True or false?
True
In intermediate filaments, what is the role of hemi-desmosomes?
Hold cells onto the basal lamina
Intermediate filaments are an example of which major group of cell junctions?
Anchoring junctions
In intermediate filaments, what is the role of desmosomes?
Hold cells together
Gap junctions are an example of which major group of cell junctions?
Communicating junctions
Gap junctions allow the free passage of molecules less than ______ MWt
5000
