What is the body's response to a current of 300-700 mA?

The body's response to a current of 300-700 mA is primarily characterized by heart fibrillation. In this range of current, the electrical stimulation is strong enough to disrupt the normal electrical signals of the heart, leading to uncontrolled and chaotic heart rhythms. Heart fibrillation can result in the heart being unable to pump blood effectively, which is a critical medical emergency.

While muscle contraction and pain may occur with lower currents, it is the potential for heart fibrillation that defines the severe physiological impact associated with the 300-700 mA range. Other options like heart clamps or full contractions describe cardiac functions that do not accurately represent the effects of such high milliamperage; instead, they imply rather than acknowledge the severe cardiac disturbances caused.

Additionally, while the respiratory system can be affected by high-level electrical currents, it is not specifically the primary response noted in this current range. The correct understanding of how the body reacts to these specific electrical currents underscores the risks associated with exposure to electrical shock, particularly in industrial or high-voltage environments where electrical safety measures are critical.