Muscular System Essay

The muscular system allows your body to move which is very important for your survival. Without it you would not only never be able to move, but you would not be able to digest food and your heart would not beat.

Muscle contraction can be understood as the consequence of a process of transmission of action potentials from one neuron to another. A chemical called acetylcholine is the neurotransmitter released from the presynaptic neuron. As the postsynaptic cells on the muscle cell membrane receive the acetylcholine, the channels for the cations sodium and potassium are opened. These cations produce a net depolarization of the cell membrane and this electrical signal travels along the muscle fibers. Through the movement of calcium ions, the muscle action potential is taken into actual muscle contraction with the interaction of two types of proteins, actin and myosin.

system is to provide movement for the body. The muscular system consist of three different

Rationale, Significance and Hypothesis. An extrinsic factor, which exerts a dominant influence on skeletal muscle fiber phenotype, is the nervous system. Buller et al. (1960) elegantly demonstrated the plastic nature of skeletal muscle fibers in response to changes in innervation type. Later, Lφmo and Westgaard (Lφmo and Westgaard, 1974; Westgaard and Lφmo, 1988) demonstrated that depolarization of muscle with specific patterns and frequencies of electrical activity are sufficient to cause changes in mature muscle fiber phenotypes. However, how myofibrillar gene expression and structural organization is affected by the frequency of impulses during activity, the amount of activity over time, or other characteristics of patterned activity is essentially unknown. To answer these questions will require the isolation and study of subsets of muscle-specific proteins in relation to different electrical activation patterns in vivo, an issue that cannot be easily addressed in preparations currently used in the study of muscle development and maintenance. However, using novel in vivo approaches can, in part, circumvent this difficulty.

The latent period is the first stage of a muscle twitching. It is the time that elapses

This system consists of both the skeletal and muscular system. They work together in unison to help our body produce movement, stabilize bones and give the body support, and pump blood cells. The bones have skeletal muscles that help produce movement. With the joints they act like fulcrums while the bones and muscles work and act like a lever. Depending on how close or far away of the load to the joint make the bones and muscles create a mechanical advantage or disadvantage when lifting an object. The bone that is stationary is the skeletal system. The skeletal muscles are attached by bones by tendons which help move the body. The tendon is a strong tissue used to produce movement. It doesn't stretch. Most of the time the tendon fastens a muscle to a bone. For example, the muscle on the upper part of the arm, is known as the biceps, is pulled together by a tendon to the bones just below the elbow. When the biceps becomes shorter, the tendon holds fast and pulls up the lower arm. On the back of the arm is triceps. When the muscle contracts, it pulls and straightens the arm. This is how a person is able to walk, raise and lower the head, and much more. The bone marrow produces leukocytes and erythrocytes while the muscular system pumps it out to the cells in the body. Now the skeletal system and muscular system gives our body our shape and stability. The muscles in the muscular system like the skeletal muscles and tendons help the bones in the skeletal system have their for a and shape so they would not fall and collapse. These are the interactions of both the skeletal and muscular

The muscular system is an organ system composed of roughly 650 to 850 muscles. The muscular systems consist of skeletal, smooth and cardiac muscles. The muscular system collectively works with other organ systems to permit movement, posture, conduction of heat and the circulation of blood throughout the human body.

Smooth muscles are found in the skin, internal organs, reproductive system, major blood vessels, and excretory system. Skeletal muscles are composed of long fibers surrounded by a membranous sheath, the sarcolemma. Since the Skeletal muscles are under control by whom ever they belong to are called voluntary muscles. This muscle is attached to two or more bones which are then attached to the skeleton by tendons. For example, head and neck muscles; contraction of these muscles produces facial expressions and head movements. They are also responsible for speech and swallowing. Skeletal muscles are the main muscles which move your body. Muscles nearly always work in coordinated groups; contraction of one muscle is accompanied by relaxation of another, while other muscles stabilize nearby joints. Then the last of the muscle types is the Cardiac Muscle or the involuntary muscles. Cardiac muscles are not under conscious control they do not react by a persons decision or movement. and are connected to the nervous system which are stimulated by autonomic impulses. Cardiac muscles are found in your internal organs like the heart or the intestine. For example; they include muscles that propel food through the intestine and those that control sweating and blood pressure.

The functions of the muscular system. There are more than six hundred muscles located in the human body, all with assigned jobs. The nervous system panels the actions of the muscles and the circulatory system supplies the muscles with a opulent blood supply that delivers fuel for the muscles. Through its many muscles, the muscular system: • Allows human movement.

Muscle analysis. The amount of astaxanthin in muscle in trout fed with a low fish oil diet was 6.3 ± 1.6 g per gram of muscle and in the case of the diet with a higher level this concentration was 9.7 ± 2.2 g per gram of muscle. Therefore, rising the proportion of fish oil in diet, a 54% increase in pigmentation can be obtained. A higher amount would be expected with a longer period of administration and further experiments will clarify this assertion. As our previous work has shown {Salvador, 2007 #7} carotenoid deposition in muscle was affected by the diet. In that work, trout were fed three different diets and muscle canthaxanthin deposition was higher when phospholipids were associated with fish oil in the diet.

Muscle fibers – All human muscles contain fast and slow muscle fibers. The proportion of fast and slow fibers is genetically determined. The percentage of each fiber type varies from person to person. Fast fibers are better able to produce ATP anaerobically. Breaks down sugar

Mobility is essential for general independence as well as ensuring good health and quality of life (QoL) (Michelle, Jim, Jennifer, Sjaanie, & Judith, 2006). In old age, muscle weakness due to sarcopenia is responsible for the occurrences of frailty and important disability (Fried, et al., 2001). Especially in institutionalised elderly persons, muscle strength can deteriorate to a point where it becomes critical for independence of transfers and walking. There is strong evidence that in healthy older persons major gains in muscle strength can be obtained by resistance exercises (Latham, Bennett, Stretton, & Anderson, 2004). The ability to walk for a short distance and the grip strength are quick and inexpensive measure of physical function, and are important components of quality of life, since it reflects the capacity to undertake day-today activities. The six-minute walk distance test (6MWD) was developed by (Balke, 1963), to evaluate functional capacity like cardiovascular or pulmonary disease.

Four Things You Need To Know to Increase Muscle Mass and Achieve a Lean Body

Three activities were performed on the force platform. The force platform monitors and records the vertical ground reaction force. The first activity was to stand on the platform with hands on hips. Quickly squat, hold the position for a few seconds then quickly stand back up. The second activity was to begin in a squat position and then perform a maximal vertical jump without counter

The human skeleton has 6 main functions that provide the body with good health. They are as follows: