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Taste. As shown to the right, each taste bud consists of a cluster of sensory cells forming synapses with neurons with long axons. These project to the medulla in one of three cranial nerves (VII,IX,X). The sensory cells release glutamate when stimulated by their corresponding taste.Scattered over the tongue, there are five classical types of taste buds: salt, sweet, sour, bitter, and umami. Salt and sweet are self-explanatory.The bitter respond to various plant alkaloids, sour to acid (such as might be found in spoiled foods), and the umami to glutamate and some related substances.aste. As shown to the right, each taste bud consists of a cluster of sensory cells forming synapses with neurons with long axons. These project to the medulla in one of three cranial nerves (VII,IX,X). The sensory cells release glutamate when stimulated by their corresponding taste.
Smell and Taste Disorders (Chemosensory Disorders) The Senses of Smell and Taste The senses of smell and taste are chemosenses and belong in the chemical sensing system. The processes of smelling and tasting are complex. They begin when molecules are released by substances that stimulate the sensory cells in the nose, mouth, or throat. Olfactory nerve cells are stimulated by odors.