In a normal arterial blood gas (ABG), what is the correct pH range?

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Multiple Choice

In a normal arterial blood gas (ABG), what is the correct pH range?

Explanation:
Normal arterial pH is tightly regulated and sits in about 7.35 to 7.45, with 7.40 often used as the midpoint. Among the options, 7.40 best represents a normal arterial value because it lies right at that typical target. A pH of 7.60 would indicate alkalemia, while 7.10 or 7.20 indicate acidemia. This reflects the balance between respiratory carbon dioxide and metabolic bicarbonate that keeps pH in the narrow healthy range.

Normal arterial pH is tightly regulated and sits in about 7.35 to 7.45, with 7.40 often used as the midpoint. Among the options, 7.40 best represents a normal arterial value because it lies right at that typical target. A pH of 7.60 would indicate alkalemia, while 7.10 or 7.20 indicate acidemia. This reflects the balance between respiratory carbon dioxide and metabolic bicarbonate that keeps pH in the narrow healthy range.

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