Question

1. __________ are hollow cylinders of protein between cells that allow selected small molecules to pass between adjacent cells. where do you find these in the body? __________

Explanation:

Gap junctions are the described hollow cylinders of protein. They are found in many tissues including cardiac muscle to synchronize contractions and in epithelial tissues for inter - cellular communication.

Answer:

Gap junctions; Cardiac muscle, epithelial tissues (and many others)