[Functional restructuring of the ultrastructure of the giant neuron (Retzius') in the medicinal leech and the possible role of Ca++ ions in these processes].
As it has been demonstrated in the giant (Retzius') neuron of the leech (Hirudo medicinalis), at the synaptic activation for 5 sec. and 10 min., ultrastructural changes in the neuron are accompanied with an increasing number of Ca++ ions in hyaloplasm, mitochondria and cytosomes. After activation, the ultrastructural changes increase, and the number of Ca++ ions returns to the initial level. A suggestion is made on a trigger function of Ca++ ions when the neuronal ultrastructure changes under conditions of the synaptic activation.
D000818:Animals; D002118:Calcium / Q000502:physiology*; D002413:Cations, Divalent / Q000378:metabolism; D004558:Electric Stimulation; D005609:Free Radicals; D007865:Leeches / Q000502:physiology* / Q000648:ultrastructure; D009474:Neurons / Q000502:physiology* / Q000648:ultrastructure; D013569:Synapses / Q000502:physiology
D002413:Cations, Divalent; D005609:Free Radicals; D002118:Calcium
Funktsional'nye perestroĭki ul'trastruktury gigantskogo neĭrona (Rettsiusa) meditsinskoĭ piiavki i vozmozhnaia rol' ionov Ca++ v étikh protsessakh.