Question

pH of human blood is?
A. 8.4
B. 7.4
C. 6.4
D. 5.4

Answer 1

The blood carries and handles a variety of products it has to maintain a delicate pH balance so as not to react or damage any of the many important components it is carrying. . A compound having pH of 0-7 is acidic, pH of 7 means the compound is neutral and a pH of 7-14 means the compound of solution is basic or alkaline. Blood has to be slightly alkaline to carry its functions.

Complete answer:
Blood is the most important body fluid. It is responsible for transferring of oxygen, cells and nutrients throughout the body. As the blood carries and handles a variety of products it has to maintain a delicate pH balance so as not to react or damage any of the many important components it is carrying.
pH is known as the power of hydrogen given the concentration of hydronium ion in any substance. A compound having pH of 0-7 is acidic, pH of 7 means the compound is neutral and a pH of 7-14 means the compound of solution is basic or alkaline.
To carry its many functions blood has to maintain a healthy acid base balance. It has to slightly alkaline and have a pH of around 7.4 to carry out all its functions efficiently.

So, Option B is the correct one.

Note:
Blood has to maintain a very delicate pH value for the body to function. To maintain the pH of 7.4 blood forms a chemical buffer that protects it from any change in basicity or alkalinity. The pH buffer of blood is a combination of the body's own weak acid and weak bases that react if and when required to maintain the pH of blood.