Chronic lead exposure can cause which type of nervous system effects?

Chronic lead exposure can cause which type of nervous system effects?

• A. Alteration in the central peripheral nervous system
• B. Increased bone density
• C. Improved memory
• D. Digestive issues

Answer: (A)

Chronic lead exposure disrupts the nervous system, affecting both the brain and the peripheral nerves. Lead acts as a neurotoxin, interfering with neural development and function. In children, this shows up as cognitive deficits, learning and attention problems, and behavioral changes. In adults, it can cause peripheral neuropathy, leading to numbness, tingling, or weakness in the extremities and sometimes a wrist drop. Because the primary type of effect from chronic exposure is alterations in both the central and peripheral nervous systems, this choice best reflects the reality of lead’s neurotoxicity. Other options don’t fit the pattern: increased bone density isn’t an effect of lead exposure, memory is not improved with lead, and digestive issues, while possible, aren’t the defining nervous-system outcome of chronic exposure.

Chronic lead exposure disrupts the nervous system, affecting both the brain and the peripheral nerves. Lead acts as a neurotoxin, interfering with neural development and function. In children, this shows up as cognitive deficits, learning and attention problems, and behavioral changes. In adults, it can cause peripheral neuropathy, leading to numbness, tingling, or weakness in the extremities and sometimes a wrist drop. Because the primary type of effect from chronic exposure is alterations in both the central and peripheral nervous systems, this choice best reflects the reality of lead’s neurotoxicity. Other options don’t fit the pattern: increased bone density isn’t an effect of lead exposure, memory is not improved with lead, and digestive issues, while possible, aren’t the defining nervous-system outcome of chronic exposure.