Cell Junctions & Communication

Question 1

Zona occludens

Answer 1

Tight junctions

Question 2

macular adherens

Answer 2

Desmosomes

Question 3

zona adherens

Answer 3

Anchoring

Question 4

Gap

Answer 4

Tunnel between 2 adjacent cells

Allows direct movements of molecules between cells

Question 5

Gap Junction tunnel

Answer 5

Made out of hollow cylinders of proteins

Question 6

Desmosomes

Answer 6

2 disc-like plaques of adjoining cells connected by proteins (cadherins) locking onto each other
In skins/ intestines

Question 7

Tight junctions

Answer 7

Blocks H2O, ions
At epithelial tissues
Closes off intercellular space
Glue-like substance

Question 8

Relationship between Desmosomes and Anchoring

Answer 8

Desmosomes is a specialized form of Anchoring

Question 9

Anchoring

Answer 9

Transmembrane proteins attached to cytoskeleton binds neighbour cells together
Found in tissues which must be able to endure stretch and stress

Question 10

Relationship between Anchoring and Tight Junctions

Answer 10

Combine to form tight junctional complex around apical lateral borders of epithelial cells

Question 11

Other types of cell communications

Answer 11

Adhesions proteins & contours of adjacent membranes