Which environmental exposure during childhood can result in impaired cognitive and behavioral development, attention deficits, decreased stature, and impaired speech production and comprehension?

Which environmental exposure during childhood can result in impaired cognitive and behavioral development, attention deficits, decreased stature, and impaired speech production and comprehension?

• A. lead in paint, soil, and water supply lines
• B. hydrofluorocarbons (HFCs) in refrigerants
• C. bisphenol A (BPA) in polycarbonate plastics
• D. carbon dioxide from automobile emissions and burning of fossil fuels

Answer: (A)

Lead exposure in childhood is a neurodevelopmental hazard. Lead is a toxin that disrupts brain development, especially when exposure occurs during years of rapid growth. It can interfere with how the nervous system wires itself, leading to impaired cognitive function, behavioral problems, and attention deficits. Growth can be affected as well, resulting in decreased stature, and speech development can be hindered, affecting both production and comprehension. The main sources are lead-based paint in older homes, lead-contaminated dust and soil, and lead pipes or plumbing that taint drinking water. Even at low levels, this exposure has serious, lasting effects, which is why screening and prevention—such as remediating lead paint, cleaning up contaminated soil, and replacing lead-containing plumbing—are essential. Other listed exposures aren’t associated with this specific combination of cognitive, behavioral, growth, and speech impacts in children. HFCs, BPA, and carbon dioxide have different health or environmental concerns and don’t produce the same neurodevelopmental profile described.

Lead exposure in childhood is a neurodevelopmental hazard. Lead is a toxin that disrupts brain development, especially when exposure occurs during years of rapid growth. It can interfere with how the nervous system wires itself, leading to impaired cognitive function, behavioral problems, and attention deficits. Growth can be affected as well, resulting in decreased stature, and speech development can be hindered, affecting both production and comprehension. The main sources are lead-based paint in older homes, lead-contaminated dust and soil, and lead pipes or plumbing that taint drinking water. Even at low levels, this exposure has serious, lasting effects, which is why screening and prevention—such as remediating lead paint, cleaning up contaminated soil, and replacing lead-containing plumbing—are essential.

Other listed exposures aren’t associated with this specific combination of cognitive, behavioral, growth, and speech impacts in children. HFCs, BPA, and carbon dioxide have different health or environmental concerns and don’t produce the same neurodevelopmental profile described.