Learn More
A combination of two-dimensional (2D) and three-dimensional (3D) analyses of tissue volume ultrastructure acquired by serial block face scanning electron microscopy can greatly shorten the time required to obtain quantitative information from big data sets that contain many billions of voxels. Thus, to analyse the number of organelles of a specific type, or(More)
Presumptive photoreceptor cells are located in the receptor epithelium of the aboral organ and exhibit some common morphological characters with flagellar photoreceptors of some invertebrates, as well as with photoreceptors of vertebrates. These cells are specifically distinguished by the presence of a special membrane structure in their epinuclear zone,(More)
This investigation of the vestibular apparatus of rats exposed for 20 days to weightlessness on board an earth satellite and to acceleration during take-off and landing has revealed a set of changes in the structural and functional organization, such as adjoinment of the otolith to the utricle receptor surface and peripheral localization of the nucleoli(More)
In the course of evolution of the invertebrate gravity receptor endogenous intracellular mode of the otoliths formation (Coelenterata, Ctenophora) is changed for endogenous extracellular mode (Mollusca, Arthropoda). The intracellular otolith is represented by cristalline concretions whereas extracellular one may consists of many separate crystallic otoconia(More)
Secondarily sensitive receptor balancer cells comprise the gravity receptor in the aboral organ-polivalent organ of Ctenophora. Ctenophora are phylogenetically the first animals which created receptor cell supplied with a single flagellar kinocilium connected with the otolithic apparatus. The receptor balancer cells are innervated by the nerve fiber(More)
Electron microscopic and cytochemical studies of the synapses of the gravity receptors in Coelenterata, Ctenophora, Annelids and Molluscs has shown the mediators both of cholinergic and adrenergic systems. As a rule, the two mediatros were connected with different receptor systems (Ctenophora) or with the synaptic structures of various parts of the chain:(More)
  • 1