Question 6

Carbonic acid maintains the pH of blood.

Carbonic acid plays a crucial role in regulating the pH balance of the blood, which is essential for proper physiological function. It helps to stabilize blood pH by acting as a buffer, neutralizing excess acids or bases.

A) Digests food

Carbonic acid is not involved in the digestive process. Digestion primarily occurs in the stomach and intestines through enzymes and acids such as hydrochloric acid, rather than through carbonic acid.

B) Kills viruses

While the immune system may utilize various mechanisms to combat viruses, carbonic acid is not one of them. Its primary function is related to pH regulation rather than direct antiviral activity.

C) Maintains pH of blood

Carbonic acid is vital for maintaining the pH of blood through the bicarbonate buffer system. This system helps to keep the blood within a narrow pH range, which is essential for optimal enzyme function and metabolic processes.

D) Grows hair

Carbonic acid has no role in hair growth. Hair growth is primarily influenced by factors such as hormones, nutrition, and genetics rather than the presence of carbonic acid in the body.

Conclusion

The role of carbonic acid in maintaining the pH of blood is fundamental to homeostasis and overall health. Other options, such as digestion, viral defense, and hair growth, do not accurately reflect the functions of carbonic acid, making option C the only correct choice in this context.