What is the normal range for pH in human blood?

The normal range for pH in human blood is typically between 7.35 and 7.45. This narrow range is essential for maintaining proper physiological functions and biochemical processes. Deviations from this range can lead to conditions such as acidosis (when blood pH falls below 7.35) or alkalosis (when it rises above 7.45), both of which can have serious implications on overall health.

The body maintains this pH range through various mechanisms including buffer systems, respiratory regulation of carbon dioxide, and renal regulation of bicarbonate. These mechanisms ensure that even with metabolic activity causing fluctuations, the pH of the blood remains stable.

Other options fall outside this clinically significant range. For example, a pH lower than 7.35 could indicate an acid-base imbalance, while a pH higher than 7.45 would suggest alkalosis. Understanding the normal range of blood pH is vital for healthcare professionals in diagnosing and managing patients effectively.