The amount of Na⁺ excreted in the urine equals the amount of Na⁺ _____ minus the amount of Na⁺ _____.
A) filtered, reabsorbed
B) ingested, filtered
C) ingested, metabolically consumed
D) ingested, placed in storage

Question

Quizplus · Accepted Answer

Na⁺ is filtered from the blood into the renal tubules but is also reabsorbed back into the blood, so the amount excreted in the urine equals the amount filtered minus the amount reabsorbed. The other choices do not accurately describe the relationship between Na⁺ excretion and other factors.

The Amount of Na⁺ Excreted in the Urine Equals the Amount