NURS 3100 Exam 1 Practice Test – Prep & Study Guide Resources

This scenario describes the process of diffusion. Diffusion is the passive movement of a substance from an area of higher concentration to an area of lower concentration. In this case, the drug is crossing a membrane following ingestion, moving from an area where it is more concentrated to an area where it is less concentrated.

Option A, active transport, involves the movement of substances against a concentration gradient, requiring energy expenditure. Metabolism (Option C) refers to the chemical processes within a living organism to maintain life. Osmosis (Option D) specifically describes the movement of water across a semipermeable membrane.