What is the normal range for arterial blood pH?

The normal range for arterial blood pH is critical for assessing the acid-base status of the body. A pH value between 7.35 and 7.45 indicates that the blood is neither too acidic nor too alkaline, which is essential for the proper functioning of enzymatic processes and metabolic reactions in the body.

When the pH falls below 7.35, it indicates acidosis, which can result from various conditions like respiratory failure or metabolic disorders. Conversely, a pH above 7.45 points towards alkalosis, which can arise from respiratory or metabolic imbalances as well. The range of 7.35 to 7.45 is tightly regulated by various mechanisms, including lung function, kidney function, and buffer systems, to ensure the body maintains a stable internal environment.

The other ranges provided do not appropriately represent normal physiological conditions. For example, ranges that fall below 7.35 or above 7.45 indicate abnormal states, which are not considered normal and would suggest the presence of a pathology.