Excitation induced by ultraviolet rays in stopped frog heart.
D000818:Animals; D001001:Anura; D006321:Heart / Q000528:radiation effects*; D006339:Heart Rate; D008027:Light; D009119:Muscle Contraction; D011830:Radiation Effects; D013696:Temperature; D013997:Time Factors; D014466:Ultraviolet Rays