In general, when the nonbicarbonate buffer concentration is normal, an acute PaCO2 rise of 10 mm Hg will be associated with which of the following changes? a. [HCO3-] rises by approximately 10 mEq/L. b. [HCO3-] rises by approximately 5 mEq/L. c. [HCO3-] rises by approximately 2 mEq/L. d. [HCO3-] rises by approximately 1 mEq/L.

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