In the preparation of the frog (Rana temporaria) isolated urinary bladder, it has been stated by morphological and physiological experiments that under an exogenic acetilcholine influence certain structural-functional changes take place in the bushy interoceptor. They are manifested as a sharp deterioration in coloration the receptor with methylene blue, the receptory plates decrease in their size, character of granuloformation changes in them. Simultaneously, an increased electrical activity is observed and, on the contrary, under the influence of atropine the impulse activity drops. It should be suggested that acetilcholine acts as an activator of metabolic and as a modulator of physiological processes in the receptor.
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