Micro Biology
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Excitable tissue – 03
Excitable tissue – 03 01. Physiological (functional) lability of the tissue. Methods for its determination. Characteristics of excitability and lability of nervous and muscular tissues. Rhythm repetition (A. A. Ukhtomski). Lability (functional mobility) is the ability of the excitable tissue to generate a certain number of impulses (rate) of excitation per unit of time (Vvedensky N. E.). Its value is 500-1000 imp/sec for the nervous tissue, 200-250 imp/sec for the muscular tissue, 100-125 imp/sec for the chemical synapse. Nervous tissue has greater lability than muscle tissue . Its value depends on the functional state of the tissue. It can change in the course of a prolonged action of the stimulus, that is, the tissue can increase its lability in the process of vital activity. Rhythm assimilation is the ability of excitable tissue to change the generated number of impulses of excitations during prolonged stimulation (A. A. Ukhtomsky). 02. Parabiosis (N. E. Vvedenskiy). Tran