When the blood levels of sodium and potassium are sufficient, ________
A) not much is excreted in the urine because sodium and potassium need to be conserved
B) the kidney stops filtering sodium and potassium
C) excess is excreted in the urine
D) greater amounts are reabsorbed from the tubules back into the blood
Answer: C
A) If the levels are sufficient, sodium and potassium do not need to be conserved.
B) The kidneys continuously filter the circulating blood.
D) If the levels are sufficient, the kidney does not need to absorb greater amounts from the tubules back into the blood.
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