title: Receptor potential and impulse initiation in two varieties of reptilian muscle spindle.
mesh_terms: D000200:Action Potentials; D000818:Animals; D003864:Depression, Chemical; D066298:In Vitro Techniques; D008465:Mechanoreceptors / Q000502:physiology*; D009470:Muscle Spindles / Q000187:drug effects / Q000502:physiology*; D012911:Snakes; D013779:Tetrodotoxin / Q000494:pharmacology
chemical_list: D013779:Tetrodotoxin