What is the normal pH range in the human body?

The normal pH range in the human body is crucial for many physiological processes, including enzymatic reactions and maintaining homeostasis. The correct answer reflects that the normal arterial blood pH range is typically between 7.35 and 7.45. This range is tightly regulated by various mechanisms in the body, such as the respiratory and renal systems, to ensure optimal functioning of cellular processes.

When the pH falls below 7.35, it can lead to acidosis, whereas a pH above 7.45 indicates alkalosis. Both conditions can negatively impact health and require careful management. The chosen range encompasses the slightly alkaline pH that is ideal for maintaining stable biochemical processes in the body, thereby supporting overall metabolic function and homeostasis.

Other suggested ranges do not accurately reflect the average healthy pH of arterial blood and may lead to misinterpretations of a patient's acid-base status in clinical settings.