A chemosensor, also known as chemoreceptor, is a sensory receptor that transduces a chemical signal into an action potential. Or, more generally, a chemosensor detects certain chemical stimuli in the environment. Classes There are two main classes of the chemosensor: direct and distance. Examples of distance chemoreceptors are: olfactory receptor neurons in the olfactory system neurons in the vomeronasal organ that detect pheromones Examples of direct chemoreceptors include taste buds in the… (More on Chemoreception)