What is the expected normal range for arterial pH in humans?

The expected normal range for arterial pH in humans is between 7.35 and 7.45. This range indicates the acidity or alkalinity of the blood. Maintaining pH within this range is crucial for various physiological processes, including enzyme function and oxygen delivery. Deviations outside of this range can lead to acidosis or alkalosis, which can severely impact bodily functions.

A pH lower than 7.35 indicates acidosis, which can result from conditions like respiratory failure or metabolic disturbances. Conversely, a pH higher than 7.45 signifies alkalosis, which can occur due to hyperventilation or metabolic disorders. The body employs various compensatory mechanisms to maintain this pH range, making it vital for health and homeostasis.

The other options provided reflect abnormal ranges that would not be considered normal physiological conditions for arterial blood pH.