[The chemosensory support of feeding behavior in precocial and altricial mammals during ontogeny].

The development of the structure and function of chemosensory apparatus of the tongue of mature and immature mammals was studied by scanning electron microscopy and in behavioral tests. Heterochronic development of receptors structures of dorsal surface of the tongue was established. At birth the chemoreceptors of body and root of the tongue were relatively mature in morphological aspects (the number of taste buds with pore).

[Role of pain component in the organization of chemosensory taste reaction].

The investigation of algoinductor (histaminergic) and peptidergic relations in peripheral pain reaction of taste was performed by using of different histamine liberators (applied on tongue). By fluorescence-histochemical methods it was shown that histamine in the apical portion of papilla is derived from cells of taste buds and in the basal zone--from connective tissue cells (including mast cells). It was established in behavior trials on peptidergic system that consumption of taste solutions became changed.