Which route of exposure is exemplified by an injection?

Which route of exposure is exemplified by an injection?

• A. Inhalation
• B. Dermal
• C. Ingestion
• D. Injection

Answer: (D)

Exposure routes describe how a substance enters the body. An injection demonstrates a parenteral route, where material is delivered through a puncture with a needle directly into tissues or the bloodstream, bypassing the skin’s outer barrier and the gastrointestinal tract. This is distinct from inhalation (through the lungs), dermal exposure (through skin contact and absorption), and ingestion (through swallowing). The injection route often leads to rapid, systemic absorption, especially if delivered into a vein, and it underlines why sharps safety and sterile technique are crucial in handling hazardous materials.

Exposure routes describe how a substance enters the body. An injection demonstrates a parenteral route, where material is delivered through a puncture with a needle directly into tissues or the bloodstream, bypassing the skin’s outer barrier and the gastrointestinal tract. This is distinct from inhalation (through the lungs), dermal exposure (through skin contact and absorption), and ingestion (through swallowing). The injection route often leads to rapid, systemic absorption, especially if delivered into a vein, and it underlines why sharps safety and sterile technique are crucial in handling hazardous materials.