Muscle work - work of the whole organism

Because energy for muscular work gives end up burning glucose, energetic activity of muscles requires three conditions: 1) transport of glucose that fuels; 2) the supply of oxygen for oxidation; 3) out abundantly formed degradation products, toxins. It is clear that to do this work involves the whole body. In previous conversations, describing separate performers of the Symphony of life, we have said, how increasing the scope of activities of the various systems of the organism during muscle work" Blood vessels muscles expand, open spare capillaries, idle alone. Heart dramatically increases its activities, aiming to muscles large amount of blood. Breathing apparatus is also beginning to work harder, causing the blood more oxygen. The liver secretes in blood glucose, splitting the backup glycogen. Changing your metabolism, the fat are beginning to become carbohydrates, everywhere increase oxidative processes, and so on, Figuratively speaking, "the metabolic pot boiling. Due to the heat o loss of energy conversion, i.e. heat, which the body does not have time to give to the environment, the body temperature can rise on the athlete after a long run, especially in summer, up to 39 C and higher. Not by accident in the hot shop hard to severe muscular work. To the influence of heating microclimate added powerful internal heat buildup.
Thus, all the organs and systems change their activity in the muscles, which, therefore, represents the whole body.
In this overall activities of all physiological ensemble during muscle work nervous system plays a special role is no less important than the role of the muscles themselves. First, none of muscle contraction occurs without impulse from the brain. I. M. Sechenov wrote: "the Muscles are the engines of our body; but by themselves, without sudden changes of nervous system, they can not act, so close to the muscles in the works participates always nervous system". A continuous stream running along the nerve to the muscle speeds of 50-100 meters per second electrical signals, and as soon as they stop, it stops and working muscles. These pulses, which every second comes 60-80, and cause a series of already described "explosions" of ATP in muscle.
Second, it is the nervous system, is under the influence of feedback in the form of impulses from the muscles - sets up a working mood all other systems of the body. The brain sends signals to the heart, respiratory muscles, liver, adrenal glands, and so on, they are All included in the work.
Finally, thirdly, it is the brain, its highest division bark of the big hemispheres, muscle makes the work of the person targeted.
The human skeletal muscle especially closely associated with the cerebral cortex. If the heart and other internal organs can continue working with the defeat of the cortex of the brain (for example, in the case of stroke, bleeding in the brain), the muscles become uncontrollable, is paralysis. Hence, it is the cerebral cortex, it fronto-parietal region, is the main engine, the managing muscles when working person.
It must be emphasized that the first who studied - in 80-ies of the last century - the signals traveling along the nerve to the muscle, was the largest student Sechenov, the outstanding Russian scientist N. That Is, Vvedensky. For registration of nerve currents, leading to the muscle, he used the newly invented the telephone. The method was simple and ingenious. N. That is, Vvedensky stuck his biceps shoulder two needles, United wires with handset. How many times would come to the muscle current wave, same times ranged membrane, and Vvedensky heard while working muscles continuous sound, higher (if the second was 100 or more hesitation), lower (if vibrations were less frequent). These experiments Vvedensky has established a number of fundamental facts, which were then confirmed by modern electronic equipment.