MUSCLE PHYSIOLOGY

Detailed explanation-1: -Unlike skeletal muscle, smooth muscle is capable of maintaining tone for extended periods and often contracts involuntarily. At a cellular level, smooth muscle can be described as an involuntary, non-striated muscle.

Detailed explanation-2: -Smooth muscles are found in the posterior part of oesophagus, stomach, intestine, blood vessels, iris of eye and dermis of skin. They are involuntary as their functioning cannot be directly controlled. Action of these muscles is controlled by autonomic nervous system.

Detailed explanation-3: -Muscles that can be controlled at will are referred to as voluntary muscles. Those that are not under the control of the will (volition) are called involuntary muscles. Smooth muscles are involuntary muscles.

Detailed explanation-4: -These involuntary muscles include smooth muscles and cardiac muscles.