Effects of caffeine on electrical and mechanical activities of guinea pig taenia coli.

Action Potentials/drug effects Animals Caffeine/pharmacology Calcium/pharmacology Colon/drug effects Electric Stimulation Evoked Potentials/drug effects Guinea Pigs In Vitro Techniques Kymography Membrane Potentials/drug effects Muscle Contraction/drug effects Muscle, Smooth/drug effects Potassium/pharmacology Reserpine/pharmacology Tetrodotoxin/pharmacology

Caffeine Tetrodotoxin Reserpine Potassium Calcium