Releasers are substances or factors that initiate or trigger a response or change. These can have different names depending on the context. In the field of neuroscience, they are sometimes called "neurotransmitters," which are chemicals that transmit signals between neurons. "Hormones" are also a type of releaser, which regulate processes in the body like metabolism, growth, and mood. In the context of the fragrance industry, releasers are used to enhance the scent of perfumes and these are commonly known as "fixatives" or "odorants." Another synonym for releasers is "activators," which are used in biotechnology and chemistry to start or enhance chemical reactions. Ultimately, the term "releaser" is just one of many words that can describe the same concept depending on the discipline or context.