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What is the normal range of arterial blood pH?
A7.25 to 7.35
B7.35 to 7.45
C7.45 to 7.55
D7.00 to 7.35
Answer & Solution
Correct answer: B. 7.35 to 7.45
1. Arterial blood pH is held inside a very narrow window.
2. That window runs from 7.35 to 7.45.
3. Below 7.35 the patient is in acidosis, and a sustained pH below 7.0 can be fatal.
4. Above 7.45 the patient is in alkalosis, and a pH above 7.8 is fatal.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 26 "Fluid, Electrolyte, and Acid-Base Balance", section 26.5 Disorders of Acid-Base Balance_
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