Electrical properties of the starfish oocyte membranes.
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.
D000225:Adenine / Q000031:analogs & derivatives / Q000494:pharmacology; D000818:Animals; D002462:Cell Membrane / Q000187:drug effects / Q000502:physiology*; D004553:Electric Conductivity; D004594:Electrophysiology; D005260:Female; D007447:Invertebrate Hormones / Q000494:pharmacology; D007700:Kinetics; D008540:Meiosis; D008564:Membrane Potentials; D009865:Oocytes / Q000187:drug effects / Q000502:physiology*; D010063:Ovum / Q000502:physiology*; D013215:Starfish / Q000502:physiology*; D014817:Vitelline Membrane / Q000502:physiology
D007447:Invertebrate Hormones; D000225:Adenine