Which statement about systemic effects is true?

Which statement about systemic effects is true?

• A. They affect only the skin
• B. They are always reversible
• C. They never involve the nervous system
• D. They affect multiple organ systems

Answer: (D)

Systemic effects happen when a chemical is absorbed and circulated through the body, so the impact isn’t limited to the contact site but can involve many organs. That’s why the true statement is that these effects affect multiple organ systems—the nervous system, liver, kidneys, heart, and others can be involved depending on the chemical and dose. The other options don’t fit: exposure isn’t limited to skin, systemic effects aren’t guaranteed to be reversible, and systemic toxicants can and often do affect the nervous system. In practice, this means that exposure can produce symptoms across different body systems and emphasizes the importance of prompt, comprehensive protection and medical evaluation if exposure occurs.

Systemic effects happen when a chemical is absorbed and circulated through the body, so the impact isn’t limited to the contact site but can involve many organs. That’s why the true statement is that these effects affect multiple organ systems—the nervous system, liver, kidneys, heart, and others can be involved depending on the chemical and dose. The other options don’t fit: exposure isn’t limited to skin, systemic effects aren’t guaranteed to be reversible, and systemic toxicants can and often do affect the nervous system. In practice, this means that exposure can produce symptoms across different body systems and emphasizes the importance of prompt, comprehensive protection and medical evaluation if exposure occurs.