Effect of 6-hydroxydopamine and thyroxine on chronotropic response to norepinephrine.
D000818:Animals; D001835:Body Weight / Q000187:drug effects; D004298:Dopamine / Q000494:pharmacology*; D004357:Drug Synergism; D006321:Heart / Q000294:innervation; D006339:Heart Rate / Q000187:drug effects*; D006352:Heart Ventricles / Q000294:innervation; D008297:Male; D008856:Microscopy, Fluorescence; D009119:Muscle Contraction / Q000187:drug effects*; D009413:Nerve Fibers, Myelinated; D009638:Norepinephrine / Q000494:pharmacology*; D009929:Organ Size; D051381:Rats; D013564:Sympathetic Nervous System; D013974:Thyroxine / Q000494:pharmacology*
D013974:Thyroxine; D004298:Dopamine; D009638:Norepinephrine