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Which medication type acts on nerve impulses in the heart and may slow the heartbeat?

  1. Anti-arrhythmics

  2. Anti-coagulants

  3. Anti-hypertensives

  4. Diuretics

The correct answer is: Anti-arrhythmics

Anti-arrhythmics are a type of medication that works by affecting the nerve impulses in the heart, which can help regulate and slow down the heartbeat. This is different from the other options listed. Anti-coagulants are used to prevent blood clots, anti-hypertensives are used to lower blood pressure, and diuretics are used to reduce fluid buildup in the body. While all of these medications may be used to treat heart-related conditions, they do not directly affect nerve impulses in the same way that anti-arrhythmics do. Therefore, A is the most accurate answer.