Function Of The Muscular System Essay
P4 describe the function of the muscular system and the different fibre types
Function of the muscular system
The function of the muscular system is for the movement of the body. In the body there are averagely seven hundred muscles that make up halve a person’s body weight. There are three types of movement in the body and these are agonist, antagonist, and fixator.
Muscles generally speaking work in pairs if we are pushing or pulling. For example a bicep curl, the bicep is the agonist causing the movement and the triceps are the antagonist going in the opposition to the bicep muscles. The fixator muscle is the muscle that supports the origin of the agonist and the joint that the origin moves over so it can help the agonist muscle work efficiently.
There are different types of muscle contractions. These are; isotonic, isokinetic and isometric, under isotonic there are two types, concentric and eccentric. Isotonic contractions are ones where the muscle is caused to change length when it contracts and there is movement of a part of the body. Concentric contractions are the ones where as the muscles shortens there is tension so the muscle increase in size, for example picking up a weight. Eccentric contractions are the ones
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They can generate a lot of ATP for over a long period of time. They can go for a long time before they burnout. These types of muscle fibres are ideal for marathon runners. Fast oxidative glycolytic are also known as fast twitch fibres. They also contain a lot of myoglobin, mitochondria and blood capillaries. They use anaerobic metabolism to create energy. They are very good for activities like sprinting. The downside of them is that they burn quickly. Fast glycolytic fibres are low in myoglobin, mitochondria and blood capillaries, but they have large amounts of glycogen. They fatigue easily and are found in the arm
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