Final answer:
Histamine, leukotrienes, prostaglandins, and bradykinin are examples of inflammatory mediators, which play a key role in the body's inflammatory response to injury or infection.
Step-by-step explanation:
Histamine, leukotrienes, prostaglandins, and bradykinin are examples of inflammatory mediators. These substances are integral to the inflammatory response, which occurs when tissues are damaged or infected. Histamine, for example, is released by mast cells and causes vasodilation and increased vascular permeability, leading to the symptoms of inflammation such as redness and swelling. Leukotrienes and prostaglandins also play a crucial role in this process, with leukotrienes attracting neutrophils through chemotaxis and increasing vascular permeability, and prostaglandins causing pain by promoting vasodilation.