Question

Although much $C{O_2}$ is carried in the blood, yet blood does not become acidic, because
A. $C{O_2}$ is absorbed by the leukocytes
B. $C{O_2}$ combines with water to form ${H_2}C{O_3}$ which is neutralized by $N{a_2}C{O_3}$
C. $C{O_2}$ transport and blood buffers play an important role in it
D. it is continuously diffused though the tissues and is not allowed to accumulate

Answer 1

Hint: The acid and the base are the two components of the pH derived solutions. pH 7 can be normal or neutral. There are various solutions which have to be adjusted on either side of the pH table. This can be done either by adding acid or base as per requirement or by adding some solution that does not alter the pH of the solutions.

Complete answer:

Buffers are the solutions that can resist the pH change even on adding an acid or a base. The various buffers used are bis – TRIS, ADA, EDTA, etc. They have a definite pH value. Even on diluting the solution, the pH value does not change. The addition of a strong acid or base also cannot alter the pH value. They work by adding the Hydrogen ions to neutralize the acid or the base.
-Option A: $C{O_2}$ is absorbed by the leukocytes: Absorbance by the leukocytes does not help with the buffering capacity as the buffers are the solutions that will do the buffering work.
-Option B: $C{O_2}$ combines with water to form ${H_2}C{O_3}$ which is neutralized by $N{a_2}C{O_3}$: bicarbonate is already doing the buffering work so it does not require sodium carbonate to neutralize it.
-Option C: $C{O_2}$ transport and blood buffers play an important role in it: the blood has carbon dioxide so it has basic nature but the buffering in the blood avoids it to become basic. This buffering is done by the buffers present called bicarbonates.
-Option D: it is continuously diffused through the tissues and is not allowed to accumulate: Even if the diffusion occurs, the amount of carbon dioxide is high enough to generate a basic effect so the buffers are very important to neutralize them.

So, the answer is option (C) $C{O_2}$ transport and blood buffers play an important role in it.

Note: The buffers are like cushions that provide a flexible environment. The pH of the blood is around 7 – 7.5. The acidic and basic medium can affect the majors of an experiment. Every organism grows in a particular pH range.