Neurokinin receptors are a group of proteins found in the body that play a crucial role in transmitting signals in the nervous system. They are primarily involved in processes such as pain perception, inflammation, and the regulation of mood. There are three main types of neurokinin receptors: NK1, NK2, and NK3, each responding to specific neuropeptides like substance P and neurokinin A. These receptors are located in various tissues, including the brain, spinal cord, and gastrointestinal tract. By binding to their respective neuropeptides, neurokinin receptors can influence various physiological functions, making them important targets for research in conditions like chronic pain, anxiety, and asthma.