Question

When we breathe in air, nitrogen also goes inside along with oxygen. What is the fate of this nitrogen?

• A. It moves along with oxygen into the cells
• B. It comes out with the CO2 during exhalation
• C. It is absorbed only by the nasal cells
• D. Nitrogen concentration is already more in the cells so it is not at all absorbed.

Answer 1

The correct option is B

It comes out with the CO2 during exhalation

The correct answer is option B: It comes out with the CO2 during exhalation.

The explanation for the correct answer:

The fate of nitrogen during respiration:

1. When we breathe in the air the nitrogen goes inside the body, this nitrogen comes out with Carbon dioxide during exhalation
2. The inhalation of air comprises 20.94 % oxygen, 0.04 % carbon dioxide, and 79.02 % nitrogen. and when the inhaled air is exhaled out the composition of oxygen comprises 16.49 % oxygen, 4.49 % carbon dioxide, and 79.02 % nitrogen.
3. Among all the nitrogen is an inert gas whose composition during inhalation and exhalation remains the same.
4. Nitrogen is an important component of protein, amino acids, nucleic acids, etc

Final answer: The correct answer is an option (B)