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 protein - cylinders. They are found in many tissues including cardiac muscle, smooth muscle, and some types of epithelial tissue. They allow for electrical and chemical communication between cells.

Answer:

Gap junctions; Cardiac muscle, smooth muscle, some epithelial tissues