Nassau County EMT Practice Test

Electrical burns often show only a small entrance wound while causing extensive internal damage along the current’s path. The current travels through tissues of least resistance, and the heat generated can destroy muscles, nerves, vessels, and organs far beyond what the skin shows. That means you can have a tiny or barely noticeable entry wound but serious internal injury, including potential heart rhythm problems and kidney strain from muscle breakdown. Because external appearance doesn’t reliably reflect the severity of internal injury, the statement that entrance wounds are small relative to internal tissue damage is the best description.

External charring isn’t required and can be minimal or absent even with serious internal injury, and internal injuries can affect critical organs. Electrical burns can indeed involve the heart and other organs, not be limited to surface damage, which is why the other statements don’t fit as well.