All-or-none responses of Limulus photoreceptor cells in presence of barium ions.
D000200:Action Potentials / Q000187:drug effects*; D000818:Animals; D001464:Barium / Q000494:pharmacology*; D002462:Cell Membrane / Q000502:physiology; D003445:Crustacea; D004558:Electric Stimulation; D008027:Light; D008564:Membrane Potentials / Q000187:drug effects; D010786:Photoreceptor Cells / Q000187:drug effects*; D011343:Procaine / Q000494:pharmacology
D001464:Barium; D011343:Procaine