The 'pH' of human blood is:
Correct answer: D. 7.35 - 7.4
- A. 6.7 - 8
- B. 7.9
- C. 7.5
- D. 7.35 - 7.4
Explanation
The pH of human blood is typically around 7.35 to 7.45, which is slightly alkaline or basic. It is important for the pH of blood to remain within this narrow range as deviations can have adverse effects on bodily functions.
This question appeared on the UHS MDCAT 2013 paper, which you can sit online with every answer explained.
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About pH and pOH
pH measures hydrogen ion concentration and pOH measures hydroxide ion concentration on a logarithmic scale. Calculations use pH = minus log of hydrogen ion concentration, pOH = minus log of hydroxide ion concentration and pH plus pOH equals pKw, with separate treatment of strong and weak acids and bases.
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