Calcium and lanthanum effects at the nodal membrane.
D000818:Animals; D001001:Anura; D002118:Calcium / Q000494:pharmacology*; D007477:Ions; D007811:Lanthanum / Q000494:pharmacology*; D008564:Membrane Potentials; D009413:Nerve Fibers, Myelinated / Q000187:drug effects; D010539:Permeability; D011188:Potassium; D011901:Ranvier's Nodes / Q000187:drug effects*; D012964:Sodium; D014981:Xenopus
D007477:Ions; D007811:Lanthanum; D012964:Sodium; D011188:Potassium; D002118:Calcium