One of the buffers that contribute to pH stability in human blood is carbonic acid (H2CO3). Carbonic acid is a weak acid that dissociates into a bicarbonate ion (HCO3-) and a hydrogen ion (H+). Thus,H2CO3 ? HCO3- + H+If the pH of the blood drops, one would expect:
A. the concentration of hydroxide ion (OH-) to increase
B. the HCO3- to act as an acid and remove excess H+ with the formation of H2CO3
C. the HCO3- to act as a base and remove excess H+ with the formation of H2CO3
D. a decrease in the concentration of H2CO3 and an increase in the concentration of HCO3-
E. the concentration of bicarbonate ion (HCO3-) to increase
Answer: C
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