Lead is dangerous because it affects which body system?

Lead is dangerous because it affects which body system?

• A. It improves cognitive function.
• B. It affects the nervous system.
• C. It has no health effects.
• D. It only causes skin irritation.

Answer: (B)

Lead is dangerous because it is a potent neurotoxin that affects the nervous system. It interferes with calcium signaling in neurons, disrupts neurotransmitter release, and can impair brain development in children, leading to learning and attention problems and behavioral changes. In adults, it can cause peripheral nerve damage and cognitive issues. The other statements aren’t true: lead doesn’t improve cognitive function, it does have health effects, and its harm isn’t limited to skin irritation.

Lead is dangerous because it is a potent neurotoxin that affects the nervous system. It interferes with calcium signaling in neurons, disrupts neurotransmitter release, and can impair brain development in children, leading to learning and attention problems and behavioral changes. In adults, it can cause peripheral nerve damage and cognitive issues. The other statements aren’t true: lead doesn’t improve cognitive function, it does have health effects, and its harm isn’t limited to skin irritation.