MUSCLE PHYSIOLOGY

Detailed explanation-1: -Smooth muscle fibers are located in walls of hollow visceral organs (such as the liver, pancreas, and intestines), except the heart, appear spindle-shaped, and are also under involuntary control.

Detailed explanation-2: -Visceral smooth muscle cells (VSMC) play an essential role, through changes in their contraction-relaxation cycle, in the maintenance of homeostasis in biological systems. The features of these cells differ markedly by tissue and by species; moreover, there are often regional differences within a given tissue.

Detailed explanation-3: -The muscle commonly found in visceral organs is smooth muscle.

Detailed explanation-4: -Smooth muscles are found in the internal i.e. visceral organs and hence they are called visceral muscles. They are involuntary. They do not have striations and are hence called non-striated or non-striped muscles.

Detailed explanation-5: -At a cellular level, smooth muscle can be described as an involuntary, non-striated muscle. Smooth muscle consists of thick and thin filaments that are not arranged into sarcomeres giving it a non-striated pattern.