What is the pH value of human blood which is basic in nature?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 7.4
A pH above 7 is basic. Human blood is slightly basic, with a pH of about 7.4 (normal range 7.35–7.45). Buffers in the blood, mainly bicarbonate, together with the lungs and kidneys, keep it in this narrow range; a pH below 7.35 is called acidosis and above 7.45 alkalosis.