Intercellular Junctions Practice Test

Action potential propagation in cardiac cells is very important for the proper functioning of the heart. Which of the following intercellular connections will be most effective in cardiac cells?

A researcher observes a sample of cells and concludes that they are connected by desmosomes. What observation(s) could have led to this conclusion?

I. He notices that there is no fluid exchange between the cells

II. There is a connection between the intermediate filaments of each cell

III. The connection occurs at a single location