Neurokinins are a group of neuropeptides that play a crucial role in the nervous system. They are involved in various physiological processes, including pain perception, inflammation, and the regulation of mood. The most well-known neurokinins include substance P, neurokinin A, and neurokinin B, each with specific functions and receptors in the body. These neuropeptides interact with neurokinin receptors, which are found in the brain and other tissues. By binding to these receptors, neurokinins can influence a range of activities, such as the transmission of pain signals and the modulation of stress responses. Their study is important for understanding conditions like chronic pain and anxiety disorders.