Question

__ involve the direct joining of cells and the passage of material through the plasma membrane, while __ involve patches that hold cells together like \spot welds\ with proteins on each side.
gap junctions; tight junctions
desmosomes; gap junctions
tight junctions; desmosomes
desmosomes; tight junctions

Explanation:

Gap junctions allow direct cell - to - cell communication and material passage through plasma membranes. Tight junctions seal cells together to prevent leakage. Desmosomes are like "spot welds" that hold cells together with proteins on each side.

Answer:

C. Tight junctions; desmosomes