Three body systems work at different speeds to keep the pH in the narrow range of normal. What is the order of effectiveness for these three systems?
a. Blood buffers, kidneys, and lungs
b. Kidneys, lungs, and blood buffers
c. Blood buffers, lungs, and kidneys
d. Lungs, kidneys, and blood buffers
ANS: C
The three systems are blood buffers, lungs, and kidneys. The blood buffers' speed is a fraction of a second, the lungs take minutes, and the kidneys take hours to days.
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