Which of the following best describes smooth muscles?

Smooth muscles are best described by the characteristic that they control involuntary movements. These types of muscles are found in various internal structures, including the walls of hollow organs such as the intestines, blood vessels, and the bladder. Unlike skeletal muscles, which are under voluntary control and allow for conscious movements, smooth muscles operate automatically without requiring conscious thought. This involuntary control is essential for maintaining essential body functions, such as digestion, blood circulation, and urine flow.

Additionally, smooth muscles are non-striated, meaning they do not have the banded appearance that is seen in skeletal muscle, further reinforcing the distinction between these two muscle types. Their primary function is not to facilitate voluntary movements like those of skeletal muscles but rather to manage the automatic processes that sustain the body's homeostasis.