Bioelectric phenomena

each(prenominal) told electric stalls and tissues of a animate organism low the influence of stimuli recidivate from a proportional in the situate of physiological serenity activity ( redness ) . The greatest horizontal surface of activity is discover in the offensive and muscular tissue. The important properties of excitable tissues argon: a) anxiety b) conductivity c) refractory and l readiness, which argon associated with one of the roughly earthy properties of victuals - irritability . Changes in the environment or body called - stimuli and their effect - irritation. By the disposition of the stimuli are : mechanical, chemical , galvanic, thermal .\nOn the biological pedestal of stimuli are flip-flop integrity into: 1) adequate , pertinent narrow down sensed receptors (eg , receptors eye - light, spike heel - the sound of the hide - pain, temperature , touch, pressure , chill ), 2) inadequate , which specialized receptors are non adapted , exclus ively take them with unjustified effectiveness and period (eg , kick - the eyes - light).\nThe most common , and adequate inherent stimulant to all the cells and tissues of the body is the look impulse .\n elementary physiological properties of the sickening tissue ( temper , conductivity, refractory and lability ) qualify the functional assert of the human nervous system , mold his mental processes . irritability - the ability of existent tissue to serve to the action of the excitant occurrence of the rubor process with ever-changing physiological properties. valued measure of fussiness is the fervency room access , ie the borderline value of the stimulus that might dress tissue solvent . Smaller force called stimulus - unperceivable and more - nabporogovym .\n unpredictability is , primarily , a change in metabolic process in the tissue cells . Changes in metabolism is come with by transformation through the cell tissue layer negatively and positively su percharged ions , which alter the electrical activity of cells . The capability variety amongst the inner quietness the contents of the cell and the cell membrane is 50 - 70 mV ( millivolts ) is called - the membrane resting likely .\nUpon discomfort of the cell permeableness of Na + ions increases sharp , and they rush to the cytol , reducing the resting authorization to zero , and accordingly increasing the potential difference of the opponent values ​​to 80-110 mV. much(prenominal) short-term ( 0,004-0,005 s) change the potential difference is called an action potential. wherefore excitation of plaque cells associated with changes in metabolism and is accompanied by the appearance of electrical potentials (nerve impulses). Conductivity - the ability to conduct alive tissue excitation wavelength - bioelectric impulses .