Neurokinin A is a neuropeptide that plays a significant role in the nervous system. It is part of the tachykinin family of peptides and is involved in various physiological processes, including pain perception, inflammation, and respiratory functions. Neurokinin A primarily acts on specific receptors known as neurokinin-2 receptors, influencing smooth muscle contraction and neurotransmission. This peptide is produced in the brain and peripheral tissues, contributing to the regulation of mood and stress responses. Research has shown that neurokinin A may also be linked to certain conditions, such as asthma and migraines, highlighting its importance in both health and disease.