What is the pH level of blood of a normal person?
- A4.5–4.6
- B6.45–6.55
- C7.35–7.45Correct
- D8.25–8.35
Explanation
The correct answer is C because the blood of a normal human being is slightly alkaline or basic in nature. The standard pH range for arterial blood is strictly maintained between 7.35 and 7.45. This narrow range is critical for the proper functioning of metabolic processes and enzymes. Any significant deviation below 7.35 is known as acidosis, while a deviation above 7.45 is known as alkalosis, both of which can be life threatening. The body uses chemical buffers, the lungs, and the kidneys to keep the pH within this specific range.
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