Structural Pest Control Applicator Practice Exam

An example of a chronic effect caused by certain pesticides is the drop in which essential body enzyme?

1. Hemoglobin

2. Cholinesterase

3. Insulin

4. Catalase

The correct answer is: Cholinesterase

The drop in cholinesterase is a well-documented chronic effect associated with certain pesticides, particularly organophosphate and carbamate insecticides. Cholinesterase is an essential enzyme in the nervous system that breaks down acetylcholine, a neurotransmitter that relays messages between nerve cells. When cholinesterase is inhibited by exposure to these pesticides, it leads to an accumulation of acetylcholine, resulting in prolonged stimulation of the nerves and potentially causing neurotoxic effects over time. Chronic exposure to pesticides that inhibit cholinesterase can lead to long-lasting health issues, including neurological damage, respiratory problems, and cognitive impairments. Monitoring cholinesterase levels in workers exposed to these chemicals is a common practice to assess potential exposure and the need for protective measures. In contrast, the other enzymes and compounds listed, such as hemoglobin, insulin, and catalase, do not exhibit the same direct relationship with pesticide exposure that leads to chronic health effects in the context of structural pest control. Hemoglobin is primarily responsible for oxygen transport in the blood, insulin regulates blood sugar levels, and catalase breaks down hydrogen peroxide, a different biochemical function. Thus, understanding cholinesterase and its implications in pesticide exposure is crucial for risk