Related Experiment Video
Updated: Oct 12, 2026

Yeast Luminometric and Xenopus Oocyte Electrophysiological Examinations of the Molecular Mechanosensitivity of TRPV4
Published on: December 31, 2013
Electrical properties of the starfish oocyte membranes
Abstract:
The electrical parameters of both vitelline and plasma membranes have been measured in Marthasterias glacialis oocytes. Voltage-current relationship was studied by an original method using a single intracellular micro-electrode. The analysis of V-I curves obtained by this method reveals rectifying properties of the plasma membrane. Bath application of 1-methyladenine, the hormone wich controls meiosis reinitiation, triggers without lag a partial depolarization of the plasma membrane, whereas the total ionic conductance undergoes typical variations.
Related Concept Videos
The Resting Membrane Potential
Membrane Fluidity
Resting Membrane Potential
The Inside of a Neuron is More Negative
The membrane potential of a cell can be measured by inserting a microelectrode into a cell and comparing the charge to a reference electrode in the extracellular fluid. The...
Potentiometry: Membrane Electrodes
Action Potential: Phases of Stimulation
Resting Phase:
In this phase, the cell's membrane is at its resting potential, typically around -70 millivolts (mV) for neurons. Inside the cell, there is a higher concentration of potassium ions (K+) and a lower concentration of sodium ions (Na+). Voltage-gated sodium channels are closed, and...
The Electrical Double Layer

