Term
| 1. Describe the olfactory organs |
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Definition
| Provide the sense of olfaction, organs are located in the nasal cavity on either side of the nasal septum, each consists of an olfactory epithelium |
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Term
| 2. What do olfactory glands do? |
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Definition
| Secretions absorb water and form pigmented mucus that covers the epithelium, the mucus is produced in a continuous stream that passes across the surface of the olfactory organs, preventing the buildup of potentially dangerous or overpowering stimuli and keeping the area moist and free from dust or other debris |
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Term
| 3. Olfactory receptor cells are replaced by basal cells. Why is this unusual? |
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Definition
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Term
| 4. Define odorant binding proteins |
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Definition
| receptors on the surfaces of the cilia that interact with dissolved chemicals as olfactory reception occurs |
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Term
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Definition
| are chemicals that stimulate olfactory receptors; the binding of an odorant changes the permeability of the receptor plasma membrane, producing action potentials |
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Term
| 5. How many receptors are in our nose? |
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Definition
| Approx. 10-20 million olfactory receptor cells are packed into an area of roughly 5 cm^2 |
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Term
| 6. Define olfactory bulbs |
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Definition
| expanded ends of the olfactory tracts; the sites where the axons of N I synapse on CNS interneurons that lie beneath the frontal lobe of the cerebrum |
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Term
| 7. How do smell sensations get into the cortex? |
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Definition
| Through the olfactory pathway |
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Term
| 8. Define retronasal olfaction |
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Definition
| The act of sensing odors that originate from substances in our mouth |
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