Lead poisoning is defined as which of the following?

• A. A short-term memory loss condition.
• B. A disease caused by exposure to mercury.
• C. A medical condition caused by toxic levels of the metal lead in the blood.
• D. A vitamin deficiency.

Answer: (C)

Lead poisoning is defined as a medical condition caused by toxic levels of the metal lead in the blood. This means the body has been exposed to enough lead to disrupt normal function, potentially affecting the nervous system, kidneys, blood formation, and other organs. Diagnosis is by measuring the blood lead level. It’s not defined by short-term memory loss alone—memory issues can occur as a symptom, but the definition centers on harmful lead levels. It’s not about mercury exposure or a vitamin deficiency, which involve different causes.