Question

Gap junctions:

a. allow communication between cells and an exchange of ions

b. cause cell membranes to tightly fuse together

c. extend around the cell like a belt

d. connect adjacent cells and their cytoskeleton

e. all of the above

Answer 1

ANSWER IS OPTION A - allow communication between cells and an exchange of ions

Gap junction is otherwise called the macula communicans because it help in the communication between two adjascent cell.

Gap junction connect the cytoplasm of the two cell and help in the transport of ions , fluid, electrical impulse.

Th main protein with which the teh gap junction channel is made up of is Connexin.

This type of cell junctions are seen in all cell except undeveloped skeletal muscle

Option B is wrong , because the junction that bind the cell membrane together is TIGHT JUNCTION.

Option C is wrong , beacuse the Junction that is extending around the cell like a belt is CONTINIOUS TIGHT JUNCTION.

Option D - the junction that connect the cell and their cytoskeleton is Called ANCHORING JUNCTION

Example for Anchoring junctions are Desmosomes , Hemidesmosomes.