Multiple choice

Which of the following is an effect of carbon monoxide on the body?

  1. it shuts down the nervous system

  2. it destroys the respiratory system

  3. takes the place of O2 that should b entering the bloodstream

  4. kills red blood cells
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Carbon monoxide binds to hemoglobin with much greater affinity than oxygen, effectively displacing O2 and reducing the blood's oxygen-carrying capacity. It doesn't shut down the nervous system, destroy the respiratory system, or kill red blood cells directly.

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