How quickly can the chemical buffers in the blood adjust pH?

1. The body has three lines of defense against pH changes: chemical buffers, respiration, and renal regulation. 2. Each acts on a different timescale. 3. Chemical buffers act within seconds, the fastest of the three. 4. So the correct answer is seconds, not the slower minutes, hours, or days. _Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 26 "Fluid, Electrolyte, and Acid-Base Balance", p.1264 §Buffer Systems in the Body_