Multiple choice

When nitrogenous waste products accumulate in the blood, it is an indication that the

  1. heart is not functioning properly

  2. kidneys are not functioning properly

  3. lungs are not functioning properly

  4. liver is not functioning properly
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Wastes in the blood come from the normal breakdown of active tissues, such as muscles, and from food. The body uses food for energy and self-repairs. After the body has taken what it needs from food, wastes are sent to the blood. If the kidneys did not remove them, these wastes would build up in the blood and damage the body. When nitrogenous waste products accumulate in the blood, it is an indication that the kidneys are not functioning properly.

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