What is the body's response to a current of 100-300 mA?

• A. Respiratory system shuts down
• B. Heart clamps, full contraction
• C. Heart fibrillation
• D. Tissue and organs burn

Answer: (C)

The body's response to a current of 100-300 mA is primarily heart fibrillation. This level of current can disrupt the normal electrical signals that coordinate the heart’s rhythm, leading to a condition known as ventricular fibrillation. In this state, the heart muscle experiences chaotic electrical activity instead of regular rhythmic contractions, which can prevent the heart from effectively pumping blood. This is a critical condition that can lead to cardiac arrest and requires immediate medical intervention.

Lower levels of current, such as those below 100 mA, might cause other issues, but in the range of 100-300 mA, the risk of heart fibrillation becomes significant due to the potential to interfere with the heart's electrical conduction system. Understanding this threshold is crucial for electrical safety and recognizing the dangers associated with electrical shock.