Question 16

Carbonic acid becomes a substance that maintains the pH of blood within the human body.

Carbonic acid plays a crucial role in regulating the pH levels of blood, ensuring that the body maintains a stable internal environment necessary for proper physiological functions.

A) Digests food

Carbonic acid does not directly participate in the digestion of food. Digestion is primarily facilitated by enzymes and acids in the stomach, not by carbonic acid, which is more involved in pH regulation than in the digestive process.

B) Kills viruses

While certain acids can have antimicrobial properties, carbonic acid is not recognized as a substance that kills viruses. Its primary function is related to maintaining pH balance rather than acting as an antiviral agent.

C) Maintains pH of blood

This option accurately describes the function of carbonic acid in the human body. Carbonic acid dissociates into bicarbonate and protons, helping to buffer blood pH and maintain homeostasis, which is vital for various biological processes.

D) Grows hair

There is no scientific basis for the claim that carbonic acid contributes to hair growth. Hair growth is influenced by various factors including genetics, hormones, and nutrients, but not by carbonic acid.

Conclusion

The correct answer is C, as carbonic acid is essential for maintaining the pH of blood, which is critical for overall health and functionality of biological systems. All other options fail to accurately reflect the role of carbonic acid in the human body, emphasizing its importance in pH regulation rather than in digestion, antiviral action, or hair growth.