Cellular function deteriorates and death occurs when the pH:
A. drops below 7.0 or rises above 7.5.
B. drops below 7.1 or rises above 7.6.
C. drops below 6.9 or rises above 7.8.
D. fluctuates between 7.35 and 7.45.
Ans: C. drops below 6.9 or rises above 7.8.
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