title: Ultrastructural peculiarities of the chemical transmission of the nerve impulse in the gravity receptors of some invertebrates.
abstract: 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: receptor--neuron--effector (Medusa, Annelids). The synaptic transmission in the gravity receptor of studied molluscs classes is carried out by means of either cholinergic or adrenergic systems.
mesh_terms: D000320:Adrenergic Fibers / Q000648:ultrastructure; D000818:Animals; D000845:Annelida / Q000033:anatomy & histology*; D002799:Cholinergic Fibers / Q000648:ultrastructure; D003063:Cnidaria / Q000033:anatomy & histology*; D006112:Gravitation; D006651:Histocytochemistry; D008465:Mechanoreceptors / Q000648:ultrastructure*; D008974:Mollusca / Q000033:anatomy & histology*; D013045:Species Specificity; D013569:Synapses / Q000648:ultrastructure; D009435:Synaptic Transmission