DRUG ABSORPTION, DISTRIBUTION AND ELIMINATION ...

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c. Carrier-mediated facilitated transport occurs for some drugs, particularly those which are analogs of endogenous compounds for which there already exist specific membrane carrier systems. For example, methotrexate, an anticancer drug which is structurally similar to folic acid, is actively transported by the folate membrane transport system. 2.

  System, Transport, Membrane, Membrane transport