[Regulation of spontaneous oscillations in the ureteral membrane potential by using physiologically active compounds]

I. a. perfusion of the Krebs solution of the cat ureter virtually altered characteristics of slow wave activity (SWA) observed with the blood circulation. Introduction of physiologically active substances into the solution restored some characteristics of the SWA. The SWA seems to depend not only on ionic exchange and properties of electrically controlled channels, but also on the set of native physiologically active substances.