Which class of pesticides tends to accumulate in fatty tissues of animals?

Which class of pesticides tends to accumulate in fatty tissues of animals?

• A. Pyrethroids
• B. Organophosphates
• C. Chlorinated hydrocarbons
• D. Carbamates

Answer: (C)

The main idea is lipophilicity combined with environmental persistence driving accumulation in animal tissue. Chlorinated hydrocarbons are highly fat-soluble and very persistent in the environment; their chemical structure includes chlorine atoms that make them resistant to breakdown. Because they dissolve in fats, they build up in fatty tissues and are released slowly over time, leading to long-lasting stores in animals and even biomagnification up the food chain. This is why chlorinated hydrocarbons tend to accumulate in fatty tissues. In contrast, organophosphates and carbamates are typically more readily broken down in the body and environment and don’t persist in fat to the same extent; they act mainly as cholinesterase inhibitors and are excreted with less long-term storage. Pyrethroids are more biodegradable than chlorinated hydrocarbons and, while some can be lipophilic, they generally don’t accumulate in fatty tissues to the same degree as chlorinated hydrocarbons.

The main idea is lipophilicity combined with environmental persistence driving accumulation in animal tissue. Chlorinated hydrocarbons are highly fat-soluble and very persistent in the environment; their chemical structure includes chlorine atoms that make them resistant to breakdown. Because they dissolve in fats, they build up in fatty tissues and are released slowly over time, leading to long-lasting stores in animals and even biomagnification up the food chain. This is why chlorinated hydrocarbons tend to accumulate in fatty tissues.

In contrast, organophosphates and carbamates are typically more readily broken down in the body and environment and don’t persist in fat to the same extent; they act mainly as cholinesterase inhibitors and are excreted with less long-term storage. Pyrethroids are more biodegradable than chlorinated hydrocarbons and, while some can be lipophilic, they generally don’t accumulate in fatty tissues to the same degree as chlorinated hydrocarbons.