CEVAP:

The surface of the tongue contains many ridges and valleys caused by the presence of the structures called papillae. All of the papillae (except the filiform papillae) contain taste buds and the whole tongue contains about 10,000 taste buds. When a bud is examined in detail, it is observed that between 40 and 100 taste cells are present. The signals formed in the receptors are sent to the brain stem and then to the cerebral cortex via the taste signal. The taste of the thing that the person eats is determined by the arrival of these signals at the brain.