One of the primary waste products of normal cellular metabolism that must be removed from the body by the lungs is:

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Study for the Nassau County EMT Test. Prepare with flashcards and multiple-choice questions. Each question is accompanied by hints and explanations. Get ready for your exam!

Multiple Choice

One of the primary waste products of normal cellular metabolism that must be removed from the body by the lungs is:

Explanation:
Carbon dioxide is the waste product produced by cells during metabolism that must be removed from the body by the lungs. As cells generate energy, CO2 is formed and travels in the blood to the lungs, where it diffuses into the alveoli and is exhaled. This removal helps maintain the body’s acid-base balance. Oxygen, in contrast, is taken in for use in metabolism, not expelled as waste. Ammonia from protein breakdown is converted to urea in the liver and discharged by the kidneys, not through the lungs. So the lungs’ job is to exhale carbon dioxide.

Carbon dioxide is the waste product produced by cells during metabolism that must be removed from the body by the lungs. As cells generate energy, CO2 is formed and travels in the blood to the lungs, where it diffuses into the alveoli and is exhaled. This removal helps maintain the body’s acid-base balance. Oxygen, in contrast, is taken in for use in metabolism, not expelled as waste. Ammonia from protein breakdown is converted to urea in the liver and discharged by the kidneys, not through the lungs. So the lungs’ job is to exhale carbon dioxide.

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