Ultrastructure of the bimodal pacemaker neuron in the central nervous system of Helix pomatia L.

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Abstract

The fine structure of the identified (RPa1) giant neuron of Helix pomatias has been investigated after isolation. The following findings have been established: 1. The cytoplasm of the RPa1 neuron is electron-microscopically characterized by a strongly invaginated nuclear envelope, a highly-developed rER system, a large number of free ribosomes and by 110-250 nm-sized neurosecretory-like granules with finely-granulated inner content. 2. The fine-structural arrangement of the cytoplasm exhibited a seasonal variation, viz. in winter it was found to be layered, while in spring it showed a homogeneous structure. 3. On the cell surface free axon profiles containing vesicles were sometimes found, which might be afferent connections to the cell body.

Original languageEnglish
Pages (from-to)317-334
Number of pages18
JournalActa Biologica Academiae Scientiarum Hungaricae
Volume30
Issue number4
Publication statusPublished - 1979

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Helix pomatia
Pacemakers
Neurology
cytoplasm
ultrastructure
nervous system
Neurons
central nervous system
Cytoplasm
Central Nervous System
neurons
Nuclear Envelope
nuclear membrane
vesicle
ribosomes
Ribosomes
axons
Axons
granules
seasonal variation

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)

Cite this

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title = "Ultrastructure of the bimodal pacemaker neuron in the central nervous system of Helix pomatia L.",
abstract = "The fine structure of the identified (RPa1) giant neuron of Helix pomatias has been investigated after isolation. The following findings have been established: 1. The cytoplasm of the RPa1 neuron is electron-microscopically characterized by a strongly invaginated nuclear envelope, a highly-developed rER system, a large number of free ribosomes and by 110-250 nm-sized neurosecretory-like granules with finely-granulated inner content. 2. The fine-structural arrangement of the cytoplasm exhibited a seasonal variation, viz. in winter it was found to be layered, while in spring it showed a homogeneous structure. 3. On the cell surface free axon profiles containing vesicles were sometimes found, which might be afferent connections to the cell body.",
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T1 - Ultrastructure of the bimodal pacemaker neuron in the central nervous system of Helix pomatia L.

AU - Elekes, K.

AU - Vadasz, I.

AU - Salánki, J.

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Y1 - 1979

N2 - The fine structure of the identified (RPa1) giant neuron of Helix pomatias has been investigated after isolation. The following findings have been established: 1. The cytoplasm of the RPa1 neuron is electron-microscopically characterized by a strongly invaginated nuclear envelope, a highly-developed rER system, a large number of free ribosomes and by 110-250 nm-sized neurosecretory-like granules with finely-granulated inner content. 2. The fine-structural arrangement of the cytoplasm exhibited a seasonal variation, viz. in winter it was found to be layered, while in spring it showed a homogeneous structure. 3. On the cell surface free axon profiles containing vesicles were sometimes found, which might be afferent connections to the cell body.

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