Question
What health hazard is presented by electrical current flowing through the body?
Answer Options
- A) It may cause injury by heating tissue
- B) It may disrupt the electrical functions of cells
- C) It may cause involuntary muscle contractions
- D) All these choices are correct
Correct Answer: D
Explanation
All three options describe genuine and serious health hazards caused by electrical current flowing through the body. First, the current generates heat, which can severely burn or destroy tissues and organs along its path. Second, our bodies use electrical signals (like nerve impulses) to control functions like heart rate and breathing; an external current can interfere with these electrical functions, leading to cardiac arrest or respiratory failure.
Third, electrical current can cause involuntary muscle contractions. This is dangerous because it can prevent a person from letting go of an energized conductor, increasing the duration of the shock. Because all these hazards are significant risks, it is essential to follow all electrical safety procedures in the ham shack.
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