Feedback inhibition in metabolic pathways refers to a regulatory mechanism wherein the end product of a pathway inhibits an earlier step in the process. This form of negative feedback ensures that substances are produced in adequate amounts without overaccumulation, maintaining homeostasis within the cell. When the concentration of the end product decreases, inhibition is lifted, allowing the pathway to resume activity. Feedback inhibition is crucial in several metabolic processes, enabling cells to respond effectively to changing conditions and resource availability.