... contractile activity was 2.1 ± 0.6% and the amplitude of the largest spontaneous contractions was 9.8 ± 3.0% of maximal response to nerve stimulation. In 390 mosm/kg the frequency of spontaneous contractions decreased, but due to a fourfold increase of contraction amplitude a threefold increase of mean...

...Shinjiro Yano; Shoichi Ueda; Keiichi Ikegami; Shinji Mutoh; Matao Sakanashi Effects of some autonomic drugs on the isolated dog ureteral preparations showing spontaneous contractions were investigated quantitatively. Noradrenaline, adrenaline and phenylephnne produced increases in frequency...