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Lecture 12

Unit 2 - Lecture 12 - Taste, Smell & Touch Textbook Notes.docx

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Department
Psychology
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PSYO 1011
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PSYO 1011 Taste, Smell & Touch Supplementary Notes 1 Lecture 12: Taste, Smell & Touch October 22, 2009 Taste & Smell­ The Chemical Senses: • Receptors are sensitive to chemical molecules rather than energy Gustation­ The Sense of Taste: • Responds to 4 qualities: o Sweet o Sour o Salty o Bitter • All other taste experiences combines these qualities & other senses • Taste Buds o Chemical receptors concentrated along the edges & back of tongue o 9 000 taste buds arranged like the segments of an orange • Tasting o Hair like structures project from the top of each cell into the taste pore  Taste pore­ an opening to the outside surface of the tongue o When substance taken into mouth, it interacts with saliva to form a chemical solution  Solution flows into the taste pore & stimulates the receptor cells o Taste results from neural activity produced by taste receptors PSYO 1011 Taste, Smell & Touch Supplementary Notes 2 Olfaction­ The Sense of Smell: • Humans have 40 million olfactory receptors • Olfactory receptors have receptor structures that resemble NT binding sites on neurons • Special receptors in the nose that send impulses to a separate olfactory area in brain o Connects with brain structures involves in social &
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