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.
a voluntary muscle is a muscle that move when you tell it to Muscles in our hands (skeletal muscle) are called voluntary, because these muscles act according to the impulses (â¦ orders) given by our conscious brain. Heart (cardiac muscle) is an example of an involuntary muscle.It works all the time with impulses from our brain stem, which is involuntary. Some more examples of voluntary muscles in our body are muscles of the chest, neck, abdomen, and legs. Involuntary muscles include the muscles of the digestive system.--- Skeletal muscles, like biceps (the muscles that flex your forearm/wrist toward your shoulder) are voluntary muscles.These muscles will not flex unless you think about flexing them, and your brain sends that signal to your arm.nvoluntary muscles include the muscles of the digestive system. --- Skeletal muscles, like biceps (the muscles that flex your forearm/wrist toward your shoulder) are voluntary muscles. These muscles will not flex unless you think about flexing them, and your brain sends that signal to your arm.