When and where a toxic substance comes in contact with and causes damage to the body is known as its ____________. For example, a toxic substance comes into contact with skin and causes inflammation or irritation.

• A. Local effect
• B. Systemic effect
• C. Acute effect
• D. Allergic reaction

Answer: (A)

Local effect means damage occurs at the exact site where the substance first touches the body. When a chemical comes into contact with the skin and causes inflammation or irritation, the injury is confined to that area rather than spreading through the bloodstream to affect distant organs. If the substance were absorbed and caused harm elsewhere, that would be a systemic effect. Acute effect refers to rapid onset but isn’t defined by where the damage occurs, and an allergic reaction is an immune response that can be either local or systemic, depending on the exposure. So, the scenario described is a local effect.