Which Statement Is NOT True of the PH-Regulating Mechanisms of the Body

Multiple Choice

Which statement is NOT true of the pH-regulating mechanisms of the body?

A) The buffer systems work most rapidly to correct pH imbalances.
B) The kidneys have the greatest capacity to correct an ongoing pH imbalance.
C) The respiratory system regulates the amount of carbon dioxide present in the blood and body fluids.
D) These mechanisms work only when the blood pH falls below 7.35 or rises above 7.45.