Nitric oxide easily oxidizes to form nitrogen dioxide, which is a harmful air pollutant. Nitric oxide itself is not highly toxic, and it does not take thousands of years to break down in the atmosphere. While nitric oxide does affect the pulmonary system, it also has broader functions in the body, such as serving as a signaling molecule in the cardiovascular system.

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Nitric Oxide

Question 31

Multiple Choice

Nitric oxide

A) is a highly toxic compound.
B) easily oxidizes to form nitrogen dioxide.
C) takes thousands of years to break down once released into the atmosphere.
D) primarily affects the pulmonary system.

Correct Answer: