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Q35
(IAS/2008)
Science & Technology › Basic Science (Physics, Chemistry, Biology) › Human anatomy physiology
Answer Verified
What is the pH level of blood of a normal person?
Result
Your answer:
—
·
Correct:
C
Explanation
Normal human arterial blood is slightly alkaline, with a tightly regulated pH range centered around 7.4. The clinically accepted normal plasma pH range is 7.35–7.45; values below 7.35 indicate acidemia and values above 7.45 indicate alkalemia, so small deviations are physiologically significant [1]. Homeostatic mechanisms (buffers, respiration, and renal function) normally maintain blood pH close to 7.40, which optimizes enzyme function and oxygen delivery in tissues. Therefore, among the given options, 7.35–7.45 is the correct range for the blood pH of a normal person.
Sources
- [1] https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/blood-ph
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