The most common form of chemical exposure and can immobilize a subject quickly. This exposure occurs in atmospheres contaminated with a hazardous chemicals vapor or dust.

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

Answer: (D)

Inhalation is the route where you breathe in contaminated air, and it’s the most common form of chemical exposure in atmospheres with hazardous vapors or dust. The lungs provide a large surface area for rapid transfer of toxicants into the bloodstream, so effects can appear quickly and potentially immobilize a person. While exposure can occur through absorption (skin), contact (skin/eyes), or injection, those routes are less likely when the environment is defined by airborne contaminants, making breathing the primary exposure pathway.