The normal pH of human blood is____________?
Correct answer: C. 7.4
- A. 6.4
- B. 7.0
- C. 7.4
- D. 7.5
Explanation
Normal arterial blood is slightly alkaline, with a tightly regulated pH of about 7.35 to 7.45, commonly given as 7.4. A value of 7.0 represents neutral pH and may be chosen by students who overlook the buffering effect of blood and the need for slight alkalinity.
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