Nerve agents belong to which chemical class?

Nerve agents belong to which chemical class?

• A. Organophosphates
• B. Organosulfur compounds
• C. Organochlorines
• D. Organosilicates

Answer: (A)

Nerve agents belong to organophosphates. These are phosphorus-containing compounds with a phosphorus-oxygen framework that enables phosphorylation of acetylcholinesterase, the enzyme that breaks down acetylcholine. When this enzyme is inhibited, acetylcholine accumulates at neuromuscular and autonomic synapses, causing a rapid cholinergic crisis with muscarinic and nicotinic symptoms and potentially respiratory failure. This chemical class directly explains both the mechanism of toxicity and the distinguishing features of nerve agents. Other choices describe different types of chemicals: organosulfur compounds lack the phosphorus center, organochlorines are chlorinated hydrocarbons, and organosilicates involve silicon. Thus, organophosphates best fit the identity of nerve agents, with examples including sarin, soman, tabun, and VX.

Nerve agents belong to organophosphates. These are phosphorus-containing compounds with a phosphorus-oxygen framework that enables phosphorylation of acetylcholinesterase, the enzyme that breaks down acetylcholine. When this enzyme is inhibited, acetylcholine accumulates at neuromuscular and autonomic synapses, causing a rapid cholinergic crisis with muscarinic and nicotinic symptoms and potentially respiratory failure. This chemical class directly explains both the mechanism of toxicity and the distinguishing features of nerve agents. Other choices describe different types of chemicals: organosulfur compounds lack the phosphorus center, organochlorines are chlorinated hydrocarbons, and organosilicates involve silicon. Thus, organophosphates best fit the identity of nerve agents, with examples including sarin, soman, tabun, and VX.