Why does a change in blood pH usually result in an abnormality of one or more blood electrolyte levels?
A. Because an increase in blood pH level stimulates the thirst reflex, the person then ingests hypotonic fluids to excess, resulting in a dilution of all other serum elec-trolytes.
B. A change in the pH is a change in the hydrogen ion concentration, which causes a corresponding change in the ability of the intestinal mucosa to absorb ingested electrolytes.
C. Because hydrogen ions carry a positive charge, a change in the pH requires a corresponding change in the amount of other positive and negative charges to maintain electroneutrality of the blood.
D. Because hydrogen ions and potassium ions exist in the blood in a balanced, reci-procal relationship, an increase or decrease in the blood pH requires a corres-ponding decrease or increase in potassium ions.
C
The blood pH is a measure of the concentration of the blood hydrogen ion concentration. Hy-drogen ions are cations expressing a positive charge. In order for body fluids to remain electri-cally neutral, an increase in hydrogen ion concentration requires fewer other positive ions and more negative ions for balance. The reverse is true for decreased hydrogen ion concentration.
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