Transtubular movements of urea in the doubly perfused bullfrog kidney.
D000818:Animals; D007668:Kidney / Q000502:physiology*; D007674:Kidney Diseases; D009068:Movement; D011892:Rana catesbeiana; D014508:Urea / Q000378:metabolism*
D014508:Urea
KIDNEYS/physiology; UREA/metabolism