Action of Myofibrils In Muscular Contraction and ATP as an Energy Source for Muscular Contraction

The role of myofibrils in muscle contraction and ATP summary as an energy source for muscle contraction: The purpose of this study was to determine how myofibrils and ATP are involved and / or by determining changes in muscle contraction there were. We analyzed the structures of myofibrils and their myosin and actin subunits. Then I decided to shorten actin and muscle contraction by myosin forming a bridge between myosin head and actin filament. Also, I examined how ATP works for muscle contraction and replaced it with PCr.

The direct energy source of muscle contraction is a high energy phosphate compound called adenosine triphosphate (ATP). ATP is not the only energy carrying molecule in the cell, but it is the most important molecule and most cells die very quickly without a sufficient amount of ATP. The three main parts of the ATP molecule are as follows: adenine moiety, ribose moiety and three phosphates joined together. ATP is formed by combining adenosine diphosphate (ADP) and inorganic phosphate (Pi). This formation requires a lot of energy, which is called high energy coupling. In order to contract the muscle, the enzyme ATPase destroys ATP binding and releases energy for action. ATP is the energy produced in the form of available energy required to break up food into cells.

Under actively active conditions, ATP releases one of these high energy phosphate groups to promote muscle contraction. When this phosphate is released, ATP becomes ADP (adenosine diphosphate, deactivated form of ATP). Creatine plays an important role in order to regenerate ATP and to support further energy production - for example to complete additional representatives. Several markers of cell damage (including creatine kinase, lactate dehydrogenase, prostaglandin E and tumor necrosis factor-α) were obtained from 18 male athlete samples (20 grams of creatine monohydrate per day, study They discovered that the level of these markers decreased after the game compared to 16 control subjects who ingested maltodextrin alone.

Muscle inside the matrix is ​​usually used to enhance muscle contraction. They include molecules such as adenosine triphosphate (ATP), glycogen and creatine phosphate. According to the sliding filament model, ATP binds to the myosin head causing "ratchet" and causing contraction. Because creatine phosphate stores energy, ATP can be rapidly regenerated from adenosine diphosphate (ADP) and inorganic phosphate ions in muscle cells due to sustained contraction of 5-7 seconds. Glycogen is a form of intramuscular storage of glucose and is used to rapidly generate energy when stored in muscle and to produce lactic acid as a byproduct of metabolism. Contrary to the general idea, accumulation of lactic acid actually does not feel burning sensation when oxygen and oxidative metabolism runs short, but actually lactic acid circulates in the liver in the presence of oxygen It produces pyruvic acid. Known as co-recycling