When a person is chewing food, the concentration of ions in saliva changes with:
A. a decrease in Na+, Cl-, and HCO3-
B. a decrease in Na+, Cl-, and an increase in HCO3-
C. a decrease in K+ and Na+
D. an increase in Na+, Cl-, and HCO3-
E. a decrease in K+ and HCO3-
ANS: D
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