Which of the following statements about smooth muscles is true?

Smooth muscles are characterized by their involuntary nature and are controlled by the autonomic nervous system (ANS). This means that they function without conscious thought, allowing for automatic regulation of bodily processes. Smooth muscle tissue is found throughout various systems in the body, including in the walls of hollow organs such as the intestines, blood vessels, and the bladder.

The presence of smooth muscle allows these organs to contract and relax rhythmically, facilitating vital functions like digestion, circulation, and hormonal movements. This involuntary control is essential for maintaining homeostasis and is distinct from skeletal muscles, which are under voluntary control.

Understanding that smooth muscles are not under conscious control and are influenced by the autonomic nervous system helps clarify their role in the body’s functions and systems.