Active cellular transport of urea by frog renal tubules.
D000818:Animals; D001001:Anura; D001693:Biological Transport, Active; D007668:Kidney / Q000502:physiology*; D007684:Kidney Tubules; D014508:Urea / Q000378:metabolism*
D014508:Urea
KIDNEYS/physiology; UREA/metabolism