Uptake refers to the process by which a substance enters the body, commonly described as which exposure process?

Uptake refers to the process by which a substance enters the body, commonly described as which exposure process?

• A. Absorption
• B. Ingestion
• C. Inhalation
• D. Exposure

Answer: (A)

Uptake is about how a substance gets into the body. The process most often used to describe that entry is absorption, which covers the movement of chemicals across barriers such as the skin, the gut lining, or the membranes in the lungs into the bloodstream. Ingestion and inhalation are routes that bring a substance into the body, but they describe how exposure occurs rather than the actual crossing of barriers. Exposure is a broad term for contact with a chemical. So absorption best fits the concept of uptake.

Uptake is about how a substance gets into the body. The process most often used to describe that entry is absorption, which covers the movement of chemicals across barriers such as the skin, the gut lining, or the membranes in the lungs into the bloodstream. Ingestion and inhalation are routes that bring a substance into the body, but they describe how exposure occurs rather than the actual crossing of barriers. Exposure is a broad term for contact with a chemical. So absorption best fits the concept of uptake.