Which statement best describes neurotoxins?

• A. Damage nervous system
• B. Cause cancer
• C. Mimic hormones and disrupt the endocrine system
• D. Protect against infections

Answer: (A)

Neurotoxins are substances that interfere with the nervous system, damaging neurons or disrupting how they communicate. This can block or alter signaling between nerves, leading to symptoms like numbness, weakness, loss of coordination, seizures, or even respiratory failure in severe cases. The nervous system is what coordinates movement, sensation, and many vital bodily functions, so anything that damages it fits the description of a neurotoxin.

Among the options, the statement about damaging the nervous system is the only one that matches this idea. The others refer to different harmful effects: cancer is caused by carcinogens that promote uncontrolled cell growth, endocrine disruption involves chemicals that mimic or block hormones, and protecting against infections relates to the immune system, not neurotoxicity.