Spontaneous electrical activities of uterine corpus, periuterine part of horn and uterine cervix in response to intravenous injections of different concentrations of acetylcholine were observed. The changes of frequency and amplitude characteristics of rhythmogenesis in these conditions, both separately and with their co-active state were analysed. Acetylcholine in concentration of 10(-3) M in the blood of the animal creates the optimal conditions for synchronization and coordination of electrical activities in the above areas of the uterus.
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