title: Activation of sea urchin gametes.
mesh_terms: D000818:Animals; D002462:Cell Membrane / Q000032:analysis; D005260:Female; D005306:Fertilization; D006863:Hydrogen-Ion Concentration; D008297:Male; D010063:Ovum / Q000378:metabolism / Q000502:physiology*; D012617:Sea Urchins / Q000502:physiology*; D013081:Sperm Motility; D013084:Sperm-Ovum Interactions; D013094:Spermatozoa / Q000378:metabolism / Q000502:physiology*