Neurokinin receptors are a group of proteins found on the surface of cells that respond to neurokinins, which are small signaling molecules. These receptors play a crucial role in various physiological processes, including pain perception, inflammation, and the regulation of mood. There are three main types of neurokinin receptors: NK1, NK2, and NK3, each with distinct functions and locations in the body. When neurokinins bind to their respective receptors, they trigger a series of cellular responses that can influence behaviors and bodily functions. For example, NK1 receptors are primarily associated with the transmission of pain signals and are targeted in the treatment of certain pain conditions. Understanding these receptors is essential for developing new therapies for various diseases and disorders.