Kidneys take part in maintenance of the kislotno-core of balance of blood, экскретируя sour products of an exchange. Active reaction of urine at the person can колебатьсяв enough wide limits - from 4,5 to 8,0 that promotes maintenance рН blood plasmas at level 7,36. The reflected pain Spending ways and the acoustic analyzer centres the Nervous impulse arises in волосковых cages, is transferred to the bipolar nervous cages located in spiral ганглии of a snail (the first нейрон). The central shoots of cages spiral ганглия form acoustical, or кохлеарный, a nerve (VIII steam of craniocereberal nerves). The kohlearnyj nerve passes in an oblong brain and comes to an end on cages кохлеарных kernels (the second нейрон). Nervous fibres from кохлеарных kernels as a part of a lateral loop reach the top olive (the third нейрон). One part of fibres латеральной reaches loops of an average brain - kernels of the bottom hillocks четверохолмия, another - a medial cranked body of visual hillocks where there is a switching and is the fourth нейрон. Further fibres as a part of acoustical radiation come to an end in a bark of the top part of a temporal share of the big brain (a field 41 and 42 on Brodmanu), i.e. in the central part of the acoustic analyzer.