Which of the following is NOT a route of exposure?

• A. Inhalation
• B. Absorption
• C. Excretion
• D. Injection

Answer: (C)

The correct response is based on defining the various routes through which hazardous materials can enter the body. Inhalation, absorption, and injection are all recognized pathways for exposure to hazardous substances.

Inhalation occurs when harmful substances are breathed in, allowing them to enter the respiratory system. Absorption happens when chemicals come into contact with the skin or mucous membranes, leading to systemic effects. Injection refers to substances being introduced directly into the body through a puncture or breaking of the skin, such as with needles or bites.

Excretion, on the other hand, is not a route of exposure but rather a process by which the body eliminates waste products. It involves removing substances from the body after they have already been absorbed or metabolized, and thus it does not pertain to initial exposure routes. Understanding these distinctions is crucial for effective assessment and response in hazardous materials situations.