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The food enters the mouth, passing the [1] (tip) of the tongue. It is moved around by the motion of the tongue and teeth as the food is chewed. Its movement is facilitated by [2] on the tongue, which are jagged, aiding them in their ability to move food. [3], on the [4] of the tongue, and [5], located [6], come in contact with the [7]. Both types of papillae have [8] that have receptors for the individual tastes-sweet, sour, salty. umami (savory), and bitter. Once a tastant is bound to the receptor, it creates a signal that travels through one of three cranial nerves, depending on the location of the taste bud. For a taste bud located on the front of the tongue, the signal travels through the [9]. For a taste bud located on the back of the tongue, the signal travels through the [10]. For a taste bud located on the middle and back of the tongue, the signal travels through the [11]. These signals travel to the [12] of the brainstem, where they are relayed to the [13] for higher processing. 1 2 3 4 [Choose] medulla oblongata tastants circumvallate papillae facial nerve glossopharyngeal nerve filiform papillae fungiform papillae thalamus toward the back of the tongue vagus nerve apex taste buds ✓body