Which ion has the greatest concentration of saliva under resting conditions?
Correct Answer: HCO3-
Description: Under resting conditions, the concentrations of sodium and chloride ions in the saliva are only about 15 mEq/L each, about one-seventh to one-tenth their concentrations in plasma. Conversely, the concentration of potassium ions is about 30 mEq/L, seven times as great as in plasma, and the concentration of bicarbonate ions is 50 to 70 mEq/L, about two to three times that of plasma.
Category:
Physiology
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