Final answer:
Buffer systems vary in speed: Chemical is fastest, followed by Respiratory, then Renal, in regulating pH levels in the body.
Explanation:
Buffer systems in the body help regulate pH levels. In terms of speed, the order from fastest to slowest is Chemical, Respiratory, Renal. Chemical buffers act quickly by immediately binding to acids or bases, while the respiratory system can adjust pH within minutes by altering breathing rates. Renal buffers, managed by the kidneys, take longer but are vital for long-term pH regulation through secretion or reabsorption of ions.
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