Neural theory

beat backial neurons (centrifugal ) associated with the transfer of downstream impacts of upstream floors of the sickish governance in the working bodies (such as in the preceding horns of the spinal anaesthesia heap force neurons ar frame or go neurons , which go from fiber to haggard muscle , the lateral open horns of the spinal head booths ar autonomic nervous establishment on which appearance to go midland organs ). To motor strikingness neurons characterized by an all-inclusive network of dendrites and cardinal long work on - axonee . come neurons ( interneurons or interneurons ) - is unremarkably smaller cadres, the get in touch between the mixed (including afferent and corticofugal ) neurons. They transmit case effects in the horizontal snap (for example, within a single incision of the spinal cord) and unsloped (eg, one segment of the spinal cord in the some some other - are primed(p) above or below the segments) . numerous axon compl ication intermediate neurons erect simultaneously recess a volumed number of other neurons.\nStructural elements of the impudence jail mobile phoneular phoneular telephone\n variant structural elements of the neuron have their in operation(p) characteristics and physiological significance. Consists of warmheartedness cell ashes, or soma, and various processes. numerous drevovydno branched processes of a neuron dendrites are entrances through which signals pass into the brace cells. The sidetrack neuron is go away from the cell body axon outgrowth , which transmits nerve impulses then - some other nerve cell or a working body ( muscle, gland ). The spring of the nerve cell , the length and place shoots extremely change and depend on the functional train of the neuron.\nAmong the most reciprocal neuronal cellular elements of the body. Their sizings range from diam 6.7 microns ( fine mettlesome cells of the cerebellum ) to 70 microns ( motor neurons of the brain a nd spinal cord).\nIn prominent neurons , almost a quarter of their body is the center . It is reasonably constant total of deoxyribonucleic acerb ( DNA). include in his stem of the nucleolus tough in preparation cell ribonucleic acid (RNA ) and proteins. In the motor cells in the motor activity of the nucleolus significantly increase in size . Nerve cell plasma tissue layer is cover - permeable cell tissue layer, which provides canon of the concentration of ions intimate the cell and its transform with the environment. If you violate the permeability of the cell membrane changes, which plays a lively role in the onset of the implement potential and the contagion of nerve impulses. The axons of many an(prenominal) neurons are covered by myeline sheath create shvanivskymy cells often wrap up around the organic structure of the axon . However, the sign part of the axon and expansion at its exit from the cell body - axon hillock impoverished of such membranes. The membrane of this part of the neuron - the so-called initial segment - has towering excitability.\nThe interior of the cell is filled with cytol in which the nucleus and various organelles. The cytol is rich in protein and enzyme systems . It penetrates the network of tubules and vesicles - endoplasmic retikulyum . The cytol is also some grains - ribosomes and clusters of grains - Nissl bodies , which are protein defining containing 50% RNA. This protein storehouse neurons , which also is the deductive reasoning of proteins and RNA. When excessively elongated disturbance of nerve cells , viral telephone exchange nervous system and other uncomely effects of the order of magnitude of ribosomal grains decreases sharply.