AP BIOLOGY

Detailed explanation-1: -Communicating (gap) junctions Communicating junctions, or gap junctions allow for direct chemical communication between adjacent cellular cytoplasm through diffusion without contact with the extracellular fluid.

Detailed explanation-2: -These junctions allow communication between adjacent cells via the passage of small molecules directly from the cytoplasm of one cell to that of another.

Detailed explanation-3: -Explanation: Gap junctions are protein channels that span the intercellular space that connect two cells. They allow cytoplasmic exchange in animal cells.

Detailed explanation-4: -Direct Signaling Across Gap Junctions Gap junctions in animals and plasmodesmata in plants are connections between the plasma membranes of neighboring cells. These water-filled channels allow small signaling molecules, called intracellular mediators, to diffuse between the two cells.