Which of the following correctly describes a facet of chloride?
a. A loss of Cl– is equivalent to a gain in ac-id.
b. Cl– is usually excreted with H+ as HCl.
c. Cl– levels vary inversely with HCO3– lev-els.
d. Cl– plays a key role in acid-base buffering.
ANS: C
The concentration of extracellular chloride is inversely proportional to that of the other major an-ion, bicarbonate (HCO3–).
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