Excitation of receptors depends as on absolute values of temperature of a skin in an irritation place, and from speed and degree of its change. One receptors react to temperature drop in 0,1 °, others - in 1 °, and the third are raised only at difference achievement in 10 °. For холодовых receptors a sensitivity optimum (generation импульсации the maximum frequency) lies within 25 - 30 °, for thermal in limits - 38 - 43°С. In these areas the minimum changes of temperature cause the greatest reaction of receptors. dilantin cost
To studying секреторной activity apply deducing on a skin выводных channels of glands, or фистульный a method. The fistula is the created message between a cavity of body and environment is artificial. Fistulnye methods of research give the chance to receive pure digestive juice with the subsequent studying of their structure and digesting properties on an empty stomach, after feeding or other stimulation of secretion; to study motor, секреторную and всасывательную functions of digestive organs; to study mechanisms of regulation of activity of digestive glands. V.A.Basovym (1842) for the first time has been spent operation of imposing of a fistula of a stomach. However by means of this method it was impossible to receive pure gastric juice.