Final answer:
The process that involves the movement of a medication from its site of administration into the blood is called absorption. It can occur through different mechanisms such as active transport and passive diffusion. Absorption allows medication to enter the bloodstream and be transported to its target cells.
Step-by-step explanation:
The process that involves the movement of a medication from its site of administration into the blood is called absorption. Absorption can occur through five mechanisms: active transport, passive diffusion, facilitated diffusion, co-transport, and endocytosis. Active transport refers to the movement of a substance across a cell membrane going from an area of lower concentration to an area of higher concentration, while passive diffusion refers to the movement of substances from an area of higher concentration to an area of lower concentration. In the case of medication, absorption allows it to enter the bloodstream and be transported to its target cells.