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What is pH value of human blood ?

  • A.7.4
  • B.7.0
  • C.7.8
  • D.7.2

Answer: A

Human blood has a pH of about 7.4 - slightly alkaline.

It is held within 7.35 to 7.45 by the bicarbonate buffer system, by the lungs regulating carbon dioxide and by the kidneys excreting acid. Outside about 6.8 to 7.8 life cannot continue.

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