Drag the labels to their appropriate locations in the table below. Use only pink labels for the pink targets. Labels may be used more than once.
1) Membrane protein complexes that strengthen the adhesion between adjacent cells, like rivets, to protect against pulling forces.
2) Small channels that form across the plasma membranes of adjacent cells; especially important in intercellular communication.
3) Membrane proteins that create a watertight seal between cells.
4) Small channels between cells that are otherwise surrounded by walls; enable movement of water and solutes between cells.
5) A polysaccharide that is used to synthesize cell walls, which protect cells and help maintain their shape.
6) Long fibers of protein found in the extracellular matrix that provide structural support for cells.