When a molecule other than substrate binds to the active site of an enzyme and slows its activity

Definition

Competitive inhibition

Explanation:

Competitive inhibition is a type of enzyme inhibition where one molecule inhibits the effect of another molecule (called the substrate) by competing with it for binding at the active site of the target enzyme, thereby preventing the substrate from binding. The active site refers to the specific region of an enzyme that binds with a particular substrate. This mechanism is well-known in pharmaceutics, where specific drugs are designed to show structural resemblance to a particular substrate, preventing its normal function.

i believe it would be the lungs.