Purinergic receptors.

Adenosine/pharmacology Adenosine Monophosphate/pharmacology Adenosine Triphosphate/antagonists & inhibitors,pharmacology Animals Drug Synergism Electric Conductivity Guinea Pigs In Vitro Techniques Membrane Potentials Muscle Contraction/drug effects Muscle, Smooth/radiation effects Purine Nucleosides/metabolism Purine Nucleotides/metabolism Receptors, Drug Structure-Activity Relationship Ultraviolet Rays

Purine Nucleosides Purine Nucleotides Receptors, Drug Adenosine Monophosphate Adenosine Triphosphate Adenosine