Nitrogen Is the Largest Component of Atmospheric (Room)air

question 18

Multiple Choice

Nitrogen is the largest component of atmospheric (room) air.This concentration of nitrogen gas in the air is physiologically important to the mechanics of respiration for which of the following reasons?

• A) Nitrogen is the gas that drives our respiration.
• B) Nitrogen maintains the patency of the alveoli.
• C) Nitrogen is a substitute for oxygen at higher elevations.
• D) Nitrogen is the gas responsible for the ozone layer.

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