These are about 8 nm in diameter and, being the thinnest of the cytoskeletal filaments, are also called microfilaments. (In skeletal muscle fibers they are called thin filaments.) Some functions of actin filaments: 1  form a band just beneath the plasma membrane that.  provides mechanical strength to the cell.
The microfilaments are arranged so that the fibers appear to have stripes (striations) in them. These are also called voluntary muscles.. Smooth muscle is involuntary, and is not under conscious control; the muscles in your digestive system are smooth muscles.The cells are individual and are found in sheets instead of long fibers. (Cardiac muscle has characteristics of both, but are not referred to in the question).here skeletal muscle is voluntary, cardiac muscle is autorhythmic (beats involuntarily; generates its own action potentials). 3. Smooth muscle: refers to the muscles that are controlled involuntarily by the brain, like those attached to the base of hair follicles or in the walls of the gastro-intestinal tract.
This is a high magnification view of a striated muscle type ! Remember, cardiac and skeletal are striated types! Muscle types are also described as voluntary or involuntary. These terms imply some muscles are controlled voluntarily while others are not.Think about this for a moment! You can control the muscles moving your fingers but you cannot consciously control contractions of muscles in your heart or stomach.his is a high magnification view of a striated muscle type ! Remember, cardiac and skeletal are striated types! Muscle types are also described as voluntary or involuntary. These terms imply some muscles are controlled voluntarily while others are not.