The effect of the extracellular potassium concentration [Ko+] on the membrane and action potentials of Arion subfuscus subesophageal ganglion has been investigated. 2. An increase in [Ko+] depolarizes cellular membrane as in many other preparations. 3. A ten-fold change in [Ko+] results in a 29.4 mV change in the resting potential. 4. A modified constant field equation account for the behaviour of the resting potentials that differ considerably from the Nernst equation. 5. Mean values of internal potassium concentration [Ki+] and PNa/PK were determined. 6. Changes in frequency and shape of action potentials of spontaneous discharging neurons were observed when exposed to a high [Ko+].

Potassium effect on the electrophysiological properties of the giant nerve cell bodies of Arion subfuscus (gastropoda:pulmonata) / G. Monticelli. - In: COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. A. COMPARATIVE PHYSIOLOGY. - ISSN 0300-9629. - 63:4(1979), pp. 485-488.

Potassium effect on the electrophysiological properties of the giant nerve cell bodies of Arion subfuscus (gastropoda:pulmonata)

G. Monticelli
Primo
1979

Abstract

The effect of the extracellular potassium concentration [Ko+] on the membrane and action potentials of Arion subfuscus subesophageal ganglion has been investigated. 2. An increase in [Ko+] depolarizes cellular membrane as in many other preparations. 3. A ten-fold change in [Ko+] results in a 29.4 mV change in the resting potential. 4. A modified constant field equation account for the behaviour of the resting potentials that differ considerably from the Nernst equation. 5. Mean values of internal potassium concentration [Ki+] and PNa/PK were determined. 6. Changes in frequency and shape of action potentials of spontaneous discharging neurons were observed when exposed to a high [Ko+].
extracellular potassium; membrane potential; action potential; Arion; Arion subfuscus; subesophageal ganglion; rhythmic activity; neuron; constant field equation
Settore BIO/09 - Fisiologia
Article (author)
File in questo prodotto:
File Dimensione Formato  
ps020.pdf

accesso riservato

Tipologia: Publisher's version/PDF
Dimensione 2.9 MB
Formato Adobe PDF
2.9 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/212931
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? ND
social impact