What is the normal range for blood pH levels?

The normal range for blood pH levels is indeed between 7.35 and 7.45. This range is crucial for maintaining homeostasis and ensuring that physiological processes function properly. Blood pH is tightly regulated within this range, as deviations can lead to acidosis (a pH lower than 7.35) or alkalosis (a pH higher than 7.45), both of which can negatively impact cellular function and metabolic processes. The body employs various mechanisms, including respiratory and renal functions, to maintain this pH range, reflecting its importance in overall health.

The other ranges suggested do not align with physiological norms for arterial blood pH in humans. pH values below 7.35 indicate acidemic conditions, while values above 7.45 signify alkalemia, neither of which are considered normal for healthy individuals. Thus, the choice outlining the 7.35 to 7.45 range accurately captures the physiological standard for blood pH.