Which of the following most accurately describes the renal transport of Na+?
A. Na+ is actively transported in all segments of the tubule.
B. Primary active transport of Na+ allows for secondary active transport of glucose and H+ in the proximal tubule.
C. Most of the Na+ transport occurs in the distal convoluted tubule and collecting ducts.
D. Na+ is actively secreted into the nephron lumen by cells in the cortical collecting ducts.
E. Na+ is actively transported across the luminal membrane of proximal tubule cells in exchange for K+, by Na+/K+ ATPase pumps.
B
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