A rapid sodium-dependent block to polyspermy in sea urchin eggs.
D000818:Animals; D001693:Biological Transport, Active; D002462:Cell Membrane / Q000187:drug effects / Q000502:physiology; D005260:Female; D005306:Fertilization / Q000187:drug effects; D008297:Male; D008564:Membrane Potentials / Q000187:drug effects; D010063:Ovum / Q000187:drug effects / Q000502:physiology*; D012617:Sea Urchins; D012964:Sodium / Q000378:metabolism / Q000494:pharmacology*; D013084:Sperm-Ovum Interactions / Q000187:drug effects
D012964:Sodium