What are the Differences Between Multi-Unit and Single-Unit Smooth Muscle?
Smooth muscle can be classified into two types based on how the cells are innervated. In multi-unit smooth muscle, each muscle cell is individually innervated, allowing for more precise control. This type is found in the iris of the eye and in the walls of large arteries. In contrast, single-unit smooth muscle, also known as visceral smooth muscle, has fewer innervations with the cells connected by gap junctions, allowing for synchronized contraction. This type is found in the walls of most hollow organs.
