Nervous system symptoms associated with lead exposure include which of the following?

Nervous system symptoms associated with lead exposure include which of the following?

• A. Nerve damage
• B. Blue line on gums
• C. Constipation
• D. Uncontrollable shaking of hands

Answer: (A)

Lead exposure can injure the nervous system, producing nerve damage that shows up as peripheral neuropathy—numbness, tingling, weakness, or loss of sensation in the hands and feet. This nerve damage is a hallmark nervous-system effect of lead poisoning and is why this option is the best choice. The blue line on the gums, known as a Burtonian line, indicates chronic lead exposure but is a dental/gingival sign rather than a nervous-system symptom. Constipation is a gastrointestinal symptom commonly associated with lead poisoning. Uncontrollable shaking of the hands can occur in some cases as a tremor, but when the question focuses on nervous-system involvement, nerve damage best captures the characteristic effect on the nervous system.

Lead exposure can injure the nervous system, producing nerve damage that shows up as peripheral neuropathy—numbness, tingling, weakness, or loss of sensation in the hands and feet. This nerve damage is a hallmark nervous-system effect of lead poisoning and is why this option is the best choice.

The blue line on the gums, known as a Burtonian line, indicates chronic lead exposure but is a dental/gingival sign rather than a nervous-system symptom. Constipation is a gastrointestinal symptom commonly associated with lead poisoning. Uncontrollable shaking of the hands can occur in some cases as a tremor, but when the question focuses on nervous-system involvement, nerve damage best captures the characteristic effect on the nervous system.