A pyrethroid is an organic compound similar to the natural pyrethrins, which are produced by the flowers of pyrethrums.Pyrethroids are used as commercial and household insecticides.Pyrethroid is an organic compound produced by the flowers of pyrethrums. Scientists found that even in a bee populated area, the bees were not found near the pyrethrums. After further research they concluded that pyrethroid is a defensive chemical produced by these plants to keep bees away from the flowers by affecting the neurochemical pathway of the bees. Scientists further researched and developed a synthetic pyrethroid and was introduced as an insecticide on a commercial scale to farmers in the early 1900s. Initially it was very successful in keeping insects away. However, after a while the farmers started feeling severe mood swings and nausea on a daily basis. Later, scientists further studied the insecticide and deduced that the insecticide in large quantities also affected the neurochemical pathways of the farmers and reduced the synthesis of a neurotransmitter in the brain. Which neurotransmitter did the Pyrethroid affect in the farmers who used the insecticide in a large quantity

Correct answer: B. Serotonin

A. Acetylcholine
B. Serotonin
C. Calcitonin
D. GABA

Explanation

The information provided suggests that the synthetic pyrethroid affected the neurochemical pathways of the farmers and reduced the synthesis of a neurotransmitter in the brain. In this context, the correct answer is serotonin.Serotonin is a neurotransmitter that plays a crucial role in regulating mood, emotion, and appetite. Imbalances in serotonin levels have been associated with mood disorders, and the reduction in serotonin synthesis could contribute to symptoms like severe mood swings and nausea, as mentioned in the scenario.It's important to note that neurotransmitters such as acetylcholine, calcitonin, and GABA are not typically associated with the regulation of mood and emotions in the same way as serotonin. Therefore, in the given context, serotonin is the neurotransmitter that the pyrethroid affected in the farmers who used the insecticide in large quantities.

Last updated 3 September 2026

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