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.

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.

Accepted Answer

Soln:
Answer is (b) It comes out with the CO2 during exhalation
Explanation:
Nitrogen is the most abundant gas in nature hence while inhalation Nitrogen goes inside our body along with oxygen. But Nitrogen is not utilized by our body and it is exhaled along with carbon-di-oxide.

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