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Striped muscle tissue under the control of the somatic nervous system, i.e., skeletal muscle, is a form of voluntary control. This is one of the others three major types of muscle, and smooth muscle and myocardium. As its name suggests, is attached to the bone of the package and is composed of collagen fibers, known as tendons.Skeletal streaks individual elements known as “muscle cells” or muscle cells of skeletal muscle, called “muscle fiber” colloquially sometimes. . In the process known as myogenesis, they are formed (lead-type embryonic stem cells, muscle cells) from the fusion of the development of myoblasts. These long, cylindrical, multinucleated cells called muscle fibers.

Muscle fibers, are made up of muscle fibrils in order. It consists of myosin filaments and actin repeat sarcomere of myofibrils, as the basic functional unit of muscle fibers, responsible for the appearance of skeletal muscle strip, which provides basic facilities needed for muscle contraction. Means multiple packets of integrated muscle fibers by the terms muscle connective tissue. Muscle individual fibers are long, and is formed during the development of fusion undifferentiated immature cells of several known as myoblasts cylindrical into polynuclear cells. Discrimination in this state to complete mainly before delivery of cells, the size of the then continues to increase. When viewed under a microscope for a position in the cytoplasm cytoskeletal component of muscle fibers, skeletal muscle showed stripes unique pattern. It is the major cytoplasmic proteins (known respectively “thin filaments” “as a” thick) actin and myosin are arranged in repeating units called sarcomeres.

Interaction of actin and myosin is responsible for the contraction of muscle.
Degree of oxidative phosphorylation (fast or slow) the type of myosin is present, fiber passes: You can sort the muscle fibers, there are two basic ways. The skeletal muscle, be divided into two categories in this way you can: Enter the type II with me. Enter the I fiber is displayed in red due to the presence of oxygen-binding protein myoglobin due. Because use oxidative metabolism to generate ATP, they are suitable for slow fatigue resistance and fibers. Because myoglobin is not present, it is white, type II fibers is dependent on the glycolytic enzyme. For such fibers are effective for short bursts of speed and power, is used as the anaerobic metabolism of a specific subtype with the oxidative metabolism. There is a fatigue quickly these fibers.

Red fibers: those containing a higher level of oxygen storage protein myoglobin was the red appearance. The red muscle fibers, tend to have a capillary density and higher local mitochondria. White Fibers: Low of these were white appearance. As to learn about the functional differences between the skeletal muscle fibers, characteristic spasm of slow muscle at high speed, are classified according to the means of them, most, not overlap the previous classification completely, colors or more Based on the. Fast muscle: Some authors, will be able to split the ATP very quickly definition of fast muscle fiber to that of myosin.

However, also fast muscle fibers, and provides greater capacity than sending the electrochemical potential of the release rate of calcium and fast action, it is taken from the sarcoplasmic reticulum. Fast muscle fiber can be used to reduce the voltage of 2-3 times higher than the proportion of slow twitch fiber, and grow well developed for the transmission of energy, and are dependent on glycolysis short-term . By generating the short bursts of speed and strength than slow muscle, it is much better so fast muscle fatigue of fast muscle.

Slow twitch: slow twitch fiber to generate the re-synthesis of energy for ATP by long-term system of aerobic energy transfer. They tend to have a low level of activity of the proton pump at a slower rate contraction with a better solution sugar development capability. Give the red pigmentation to them, and a high level of mitochondrial number and large myoglobin is included in them. They, thus to have they are fatigue resistant, high concentration of mitochondrial enzymes has been demonstrated. You can be taken long before muscle fatigue of slow muscle is firing from fast muscle fiber more slowly.

The two main categories of muscle fibers, based on the myosin isoforms, there are several differentiation of type II in several subtypes are further denoted by a letter of the alphabet. In humans, there Pa then two subtypes is in IIx of, the IIx, often referred to as the classification of the previous IIb and are clustered in two different types. Then, further research, these subtypes are recognized as different, but using the first name IIb, remained to fixing. Fiber type of non-human, are included IIb fibers of the actual, the IIc, and IID,.

Macromolecules muscle fibers, are arranged so as to verify that it meets the form and functions organelles. Plasma membrane is called the cytoplasm muscle sheath known as the sarcoplasmic. There is a muscle fibrils in the sarcoplasmic. Long link protein of about 1 micrometer in diameter of muscle fibrils, is the muscle filaments, each containing. Pressed against the inside of the muscle cell membrane has to flatten the nucleus abnormally. There are mitochondria in muscle fibrils between. Muscle fibers is not a smooth endoplasmic reticulum, but it contains the sarcoplasmic reticulum. It holds a reserve of calcium ions required for muscle fibrils of sarcoplasmic reticulum surrounds, to induce muscle contraction. On a regular basis, will be expanded, the bag end known as a terminal Shisutane it. They are, across the muscle fibers from one to the other. Shisutane between the two terminals, is the mass transport of cylindrical called horizontal tubular and (T tubules). T tubules is the possibility for action for notifying the sarcoplasmic reticulum to release calcium cause muscle contraction. Together, side tubules and terminal Shisutane the two form a triad.