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Literature DB >> 5767887

Sodium influxes in internally perfused squid giant axon during voltage clamp.

Abstract

1. An experimental method for measuring ionic influxes during voltage clamp in the giant axon of Dosidicus is described; the technique combines intracellular perfusion with a method for controlling membrane potential.2. Sodium influx determinations were carried out while applying rectangular pulses of membrane depolarization. The ratio ;measured sodium influx/computed ionic flux during the early current' is 0.92 +/- 0.12.3. Plots of measured sodium influx and computed ionic flux during the early current against membrane potential are very similar. There was evidence that the membrane potential at which the sodium influx vanishes is the potential at which the early current reverses.

Entities: Chemical

Mesh：

Substances：
Sodium

Year: 1969 PMID： 5767887 PMCID： PMC1351416 DOI： 10.1113/jphysiol.1969.sp008778

Source DB: PubMed Journal: J Physiol ISSN： 0022-3751 Impact factor: 5.182

11 in total

Sodium influxes in internally perfused squid giant axon during voltage clamp.

1. ION FLUXES AND TRANSFERENCE NUMBER IN SQUID AXONS.

2. Movement of radioactive potassium and membrane current in a giant axon.

3. The ionic movements during nervous activity.

4. The components of membrane conductance in the giant axon of Loligo.

5. The dual effect of membrane potential on sodium conductance in the giant axon of Loligo.

6. Currents carried by sodium and potassium ions through the membrane of the giant axon of Loligo.

7. Sodium and potassium ion effluxes from squid axons under voltage clamp conditions.

8. Effect of tetrodotoxin on the early outward currents in perfused giant axons.

9. Kinetics of ion movement in the squid giant axon.

10. Sodium movements in perfused squid giant axons. Passive fluxes.

1. Calcium influxes and tension development in perfused single barnacle muscle fibres under membrane potential control.

2. The temperature dependence of the movement of sodium ions associated with nerve impulses.

3. Direct and rapid description of the individual ionic currents of squid axon membrane by ramp potential control.

4. Time course of the sodium permeability change during a single membrane action potential.

5. Sodium and potassium conductance changes during a membrane action potential.

6. Sodium and potassium currents in squid axons perfused with fluoride solutions.

7. Effect of stimulation and hyperpolarization on non-electrolyte and sodium permeability in perfused axons of squid.

8. Depolarization and calcium entry in squid giant axons.

9. Calcium and potassium systems of a giant barnacle muscle fibre under membrane potential control.

10. Time course of the sodium influx in squid giant axon during a single voltage clamp pulse.