[The structural traits of the signals of aggressive-defensive behaviors in the domestic cat (Felis catus L.)].

The results of the ethological-bioacoustic study carried out in 18 male domestic cats are presented in this work. Facial gesture, postural, and acoustic activity was recorded. The dynamics of frequency characteristics of sound calls was studied by means of parametric analysis, the functional significance of the recorded vocalizations was determined in the process of development of conflict situations.

[Processes facilitating conduction in the vesical plexus of the cat].

In the cat isolated bladder plexus, cholinergic transmission from parasympathetic "entry" was shown to be less obvious at low-frequency stimulation and much more effective (up to 300-1800%) at a high-frequency one (1-20/sec). During posttetanic potentiation (up to 5 min) it is possible to reach the 100% saturation of ganglion motor pool. The phenomena of facilitation were shown to be conducted through presynaptic mechanisms.