A healthy individual, weighing 60 kg, is infused with 1 L of isotonic saline to which 20 mEq of K+ has been added. Following the infusion, the plasma [K+] of this individual has increased from 3.5 mEq/L to 7.8 mEq/L
What is the most likely explanation for the development of hyperkalemia in this individual?
A. shift of K+ from the ICF into the ECF
B. impaired renal excretion of K+
C. the increase in plasma [K+] of 4.3 mEq/L is what is expected from the addition of 20 mEq/L of K+ to the ECF
D. contraction of the ECF volume
E. development of hyperosmolality
ANS: A
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