Homeland Security Exam 3 Practice

Chemical weapons are grouped by the kind of harm the chemical causes. One of the standard categories is nerve agents, which are highly toxic chemicals that disrupt the nervous system by inhibiting the enzyme acetylcholinesterase. This leads to an overabundance of acetylcholine and a cascade of effects such as drooling, sweating, muscle twitching, seizures, and potentially respiratory failure. That makes nerve agents a definitive chemical-weapon category. The other terms refer to different domains: biological agents are living organisms or biological toxins used as weapons; nuclear weapons rely on nuclear reactions; biochemical agents isn’t a recognized standard category for chemical weapons. So the best answer is nerve agents.