title: The twitch contraction in guinea-pig isolated vas deferens--result of cooperative interaction of potassium and noradrenaline released from adrenergic nerves in close junctions?
mesh_terms: D000320:Adrenergic Fibers / Q000378:metabolism*; D000818:Animals; D004558:Electric Stimulation; D006168:Guinea Pigs; D008297:Male; D009119:Muscle Contraction; D009638:Norepinephrine / Q000378:metabolism*; D011188:Potassium / Q000378:metabolism*; D014649:Vas Deferens / Q000294:innervation / Q000502:physiology*
chemical_list: D011188:Potassium; D009638:Norepinephrine