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Humans detect taste with taste receptor cells. These are clustered in taste buds and scattered in other areas of the body. Each taste bud has a pore that opens out to the surface of the tongue enabling molecules and ions taken into the mouth to reach the receptor cells inside.1  salty.2  sour. 3  sweet.4  bitter.5  umami.umans detect taste with taste receptor cells. These are clustered in taste buds and scattered in other areas of the body. Each taste bud has a pore that opens out to the surface of the tongue enabling molecules and ions taken into the mouth to reach the receptor cells inside. 1  salty. 2  sour. 3  sweet. 4  bitter. 5  umami.
Receptors. The receptor cells that mediate the sensation of taste are located in taste buds, which are the sensory organs for the taste system. Taste buds are located in different types of papillae, which are protrusions on the surface of the tongue.t is the first region of the central nervous system where sensory signals from olfactory sensory neurons are processed. As noted earlier, the axons of the olfactory sensory neurons travel in olfactory nerves and spread over the surface of the ipsilateral olfactory bulb, forming an olfactory nerve layer (Fig.