Question

complete the sentences concerning the different types of extracellular junctions. extracellular filaments gap junction ions tight junction desmosome a __ forms an impermeable barrier between epithelial cells, producing a zipperlike fastening. a forms when two adjacent plasma membrane channels join which allows and small molecules to pass between cells. in a , the adjacent plasma membranes of two different cells do not touch but are held together by __ firmly attached to cytoplasmic plaques, composed of dense protein material reset

Explanation:

Tight junctions form impermeable barriers between epithelial cells. Gap junctions are formed by joined plasma - membrane channels allowing ions and small molecules to pass. Desmosomes hold cells together with extracellular filaments attached to cytoplasmic plaques.

Answer:

1. tight junction
2. gap junction; ions
3. desmosome; extracellular filaments