So we have these two neurons and each one of these cells are basically connected. So what this basically means is if an action potential spreads to this axon and causes these three smooth muscle cells to contract, that does not mean that these neighboring cells, these cells will also contract. So that means the contraction of these smooth muscles is independent of the contraction of these neighboring smooth muscles. So this is what basically distinguishes the multi unit smooth muscle from the single unit or visceral smooth muscle. Now where we find these types of smooth muscle muscles, well, we basically find them in the smooth muscle, in the iris of our eye. We also find them in large arteries.