Skeletal Muscle Research Paper

There are three kinds of muscle tissues: smooth, cardiac and skeletal muscle. This essay will concentrates on the myology of a skeletal muscle. Skeletal muscles are voluntary muscles that we can consciously move by stimulating a signal from the brain to the desired muscle; we want to relax and contract. When viewed under the microscope (seen in fig 1a) of a longitudinal and transverse section of the skeletal muscle. Skeletal muscles are contraction specialists of the body and are striated in appearance in a highly organised internal arrangement. Three main functions of the skeletal muscles are: movement, maintenance of posture, a steady partial contraction of muscles, known as muscle tone, keeps the body in position. These are large muscles

Myofibrils contain two types of overlapping protein called filament (actin and myosin), which lie side by side. Myosin is the thick filament which is shape like a golf clubs and the actin is the main filament of the thin filament. To give you a rear viewed on these filaments, a single muscle fibre may contain an estimated 16 billion thick and 32 billion thin filaments, all arranged in this precise pattern within the myofibrils. Myofibrils take up 80% of volume within one muscle fibre. Within the sarcomere they are arranged in sections but do not stretch over the whole length of the muscle fibre. The sarcomere is a segment of the myofibril, between two Z-lines (disc). Sarcomere consists of thin filaments called actin which overlap thick filament called myosin. The thin is normal between the thick filaments which gives the skeletal muscle its striated appearance. Within the H-zone, they’re only thick filaments, no thin filament but the H-zone can disappear sometimes when contracted. The larger thick filaments, also called myosin filament, which are bundles of myosin protein and they contains ATPase enzyme with splits ATP into ADP for muscle contraction to