Which organ is affected by mercury, a common nephrotoxicant?

• A. Liver
• B. Kidney
• C. Brain
• D. Heart

Answer: (B)

Mercury is known to be a nephrotoxicant, meaning it has a toxic effect on the kidneys. The kidneys are responsible for filtering waste products from the blood and maintaining fluid and electrolyte balance in the body. When mercury enters the body, it can accumulate in kidney tissues, leading to cellular damage and impairment of renal function. This can result in conditions such as nephritis and can interfere with the kidneys' ability to properly filter blood, potentially leading to serious health consequences.

While mercury can affect the brain (causing neurotoxic effects) and has some impact on other organs, its most direct and significant toxic effects are observed in the kidneys. Understanding the specific organ systems affected by various toxins is critical for emergency responders and healthcare providers when diagnosing and managing toxic exposure cases.