[THE INFLUENCE OF HISTAMINE ON THE EFFECTOR NEURONS OF INTRAMURAL GANGLIA OF THE TRACHEA AND BRONCHI].

We considered the influence of the neurons of intramural ganglia in the reaction of the smooth muscle trachea and bronchi caused by electric field stimulation, by the action of histamine. We studied the effect of neurons of intramural ganglia in the activity of the smooth muscle trachea and bronchi in the action of low doses of histamine (0,1 and 10 μg/ml), L-NAME and hexamethonium. It was shown the blockade of neuronal transmission decreased the contraction of the smooth muscles trachea and bronchi by stimulation of the afferent nerve structures.

[Role intramural ganglion airway on action of histamine].

Influence of low concentration histamine on reactivity isolated trachea and bronchus preparations of rat induced field stimulation were studied. Application of 0.01-10 mkg histamine decreased responses preparation of trachea to 83% and bronchus to 79% at smooth muscle stimulation dose-depended manner.

Summit firn caves, mount rainier, washington.

Heat and steam from the crater fumaroles have melted over 5700 feet (1737 meters) of cave passage in the ice-filled east crater of Mount Rainier. The caves are in approximate balance with the present geothermal heat release. Future changes in the thermal activity of the summit cone will cause corresponding changes in cave passage dimensions, location, and ceiling and wall ablation features.