Multiple choice

The pH of arterial blood is ________.

  1. 6.0

  2. 7.0

  3. 7.1

  4. 7.4
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Arterial blood pH is normally 7.35-7.45, with 7.4 being the standard value. This slightly alkaline pH is tightly regulated by buffer systems (bicarbonate, hemoglobin, phosphate) and respiratory/kidney mechanisms. pH 7.0 is neutral, 6.0 is acidic, and 7.1 is too low for arterial blood.

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