AP BIOLOGY

Detailed explanation-1: -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: -In Summary: Cell Junctions Plasmodesmata are channels between adjacent plant cells, while gap junctions are channels between adjacent animal cells. However, their structures are quite different. A tight junction is a watertight seal between two adjacent cells, while a desmosome acts like a spot weld.

Detailed explanation-4: -Gap junctions are clusters of intercellular channels that allow direct diffusion of ions and small molecules between adjacent cells.

Detailed explanation-5: -Desmosomes are junctions involved in intercellular adhesion of epithelial cells and hemidesmosomes are junctions involved in adhesion of epithelia to basement membranes.