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Taste Part 1 (Teacher: Michael)

Taste enables us to differentiate between bitter, sweet, salty or sour flavours. Smell is also to distinguish between tastes, so disturbance of smell alter our taste appreciation. For instance, if your nose is blocked due to a cold, you can't smell and appear to lose your of taste as .

Dysgeusia is the medical for disturbance of taste sensation, and it usually occurs when we a dry mouth. Each person about 10,000 tastebuds. Most on the tongue but there also a few on the of the throat. They contained in raised pimples, or papillae. Large papillae mushroom-shaped and called fungiform. The smaller ones filliform papillae and mountain peaks when under the microscope. If you poke your tongue and a at the surface in a mirror, you small and large papillae on the rough-textured surface.

Taste pores, long-necked tubes, in these pimples surrounded by four types of taste buds, each of which is composed of special cells which sensitive to either sweet, sour, salty or bitter flavours. Certain chemicals in food and drink provoke these tastes by dissolving in saliva and entering the pore. Hairs projecting from these cells into the pore stimulated by the chemicals. When a nerve is provoked in this way, it sends messages to the brain via the glossopharyngeal nerve, helping us perceive taste. However, if we a dry mouth, there is not enough saliva to dissolve all the chemicals and appreciate the full flavour.

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