Chapter 17

Chapter 17 - Insulate the gustatory cells l Gustatory hair...

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Chapter 17 Olfaction and Taste 1
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l Olfactory epithelium ¡ Olfactory receptors are localized on the roof of the nasal cavity. Covered by mucus. Bipolar neurons with cilia ¡ Supporting cells ¡ Basal cells – stem cells ¡ Olfactory glands l Responsible for mucus production Anatomy of the olfactory receptors 2
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Anatomy of the olfactory receptors l Olfactory nerves ¡ Penetrates the ethmoid bone l Olfactory bulb l Olfactory tracts l Cerebral cortex – uncus l Olfactory adaptation ¡ Partial adaptation : 3-5 seconds ¡ Complete adaptation : 1-5 minutes 3
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Olfactory organs 4
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Anatomy of Taste Buds 5
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l Clustered in taste buds l Associated with lingual papillae l Types of lingual papillae ¡ Filiform - The more numerous one. No taste buds ¡ Fungiform mushroom-like. Contain taste buds ¡ Circumvallate - on a V formation on the back of the tongue. Contain taste buds Taste receptors – gustatory cells 6
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l Basal cells ¡ Stem cells l Supporting cells
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Unformatted text preview: Insulate the gustatory cells l Gustatory hair Seems to be the sensitive portion of the taste cells They are microvilli l Taste pores Opening for the gustatory hair Taste buds 7 Gustatory reception 8 l Taste buds are monitored by cranial nerves Facial anterior 2/3 of the tongue Glossopharyngeal- posterior 1/3 of the tongue Vagus taste buds on the pharynx Synapse within the solitary nucleus of the medulla oblongata Thalamus l Trigeminal will carry all the other information such as texture, and temperature Gustatory pathways 9 l Sweet receptors Sugar and some aminoacids l Salt Metallic ions l Sour Acid solutions l Bitter alkaloids l Umami Cheese, meat taste Taste buds distribution 10 Gustatory discrimination l Combine effects of smell , texture and temperature on taste 11...
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This note was uploaded on 01/06/2012 for the course BIOL 2401 taught by Professor Elainefanin during the Fall '11 term at Collins.

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Chapter 17 - Insulate the gustatory cells l Gustatory hair...

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