AEMCA Practice Exam 2026 - Free Practice Questions and Study Guide for Advanced Emergency Medical Care Assistant Certification.

Question: 1 / 975

Which substance is classified as a nephrotoxin?

Carbon Dioxide

Potassium Cyanide

The correct answer identifies potassium cyanide as a nephrotoxin, which refers specifically to substances that are harmful to the kidneys. Potassium cyanide is a highly toxic compound that can lead to kidney damage and other serious health issues. When exposed to this substance, the kidneys can suffer from direct cellular injury, potentially leading to acute kidney failure.

In contrast, carbon dioxide is a natural gas produced by cellular respiration in the body and is not classified as a nephrotoxin. Formaldehyde is a chemical compound often used in manufacturing and preservation, and while it can be harmful to various organs, it is not specifically known for causing kidney damage. Acetone, typically found in solvents and nail polish removers, also does not have nephrotoxic properties. Therefore, potassium cyanide stands out as the substance known for its deleterious effects on kidney function.

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Formaldehyde

Acetone

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