Human blood is slightly alkaline with pH 7.4 and it does not change significantly with the addition of a small amount of an acid or a base because:
Correct answer: A. Serum proteins present in the blood act as buffer
- A. Serum proteins present in the blood act as buffer
- B. Na-K channels maintain the flow of hydrogen ions
- C. Hb acts as a buffer and also helps in its coagulation
- D. It is neutral
Explanation
Human blood contains several buffer systems to resist pH changes. The primary buffer system in the blood plasma (serum) is the carbonic acid-bicarbonate system (H2CO3/HCO3−), along with phosphate buffers and serum proteins like albumin.
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