What is the normal range for arterial blood pH?

1. Blood pH must stay within a very narrow physiological range for proper enzyme and protein function. 2. This range is fixed and very narrow. 3. That range is 7.35 to 7.45. 4. Values below 7.35 indicate acidosis and above 7.45 indicate alkalosis, so the other ranges are incorrect. _Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 26 "Fluid, Electrolyte, and Acid-Base Balance", p.1270 §Disorders of Acid-Base Balance_