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18 Cards in this Set
- Front
- Back
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Role of mucous gland in smell.
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Provide aqueous solution for scents to be detected by chemoreceptors
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2 cell types of synapse for olfactory receptors.
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1. mitral cells (in olfacfactory bulb)
2. tufted cells -----BOTH FOUND IN GLOMERULI |
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5 steps of smell neuroscience.
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1. Odorant binds to specific cilia receptor
2. G-protein activates adenyl cyclase to from cAMP 3. cAMP binds to specific cation channel Na+ or Ca++ 4. Activation of Cl- 5. Receptor depolarized |
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Purpose of vomeronasal organs
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Detect pheromones involved in territory mapping, menstrual synchrony, reproductive behavior
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An activated mitral cell releases this neurotransmitter
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glutamate
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Stimulated glomerular regions inhibit non-stimulated regions by means of what 2 processes?
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1. GABA (released by tufted cells)
2. Granule cells inhibit non-activated mitral cells |
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Periglomerular cells shut off this.
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Glomerulus
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Loss of smell.
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Anosmia
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Congenital loss of olfactory receptors
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Kallman's Syndrome
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Hyperosmia
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Excessive sensitivity to smell
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Dysosmia
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altered smell- usually caused by old age
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Turnover for olfactory and taste receptors.
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Smell: 4-8 weeks
Taste: 10-14 days |
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Three cranial nerves and which areas of the tongue they associate with.
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1. Facial- anterior 2/3 &palate
2. Glossopharyngeal- post. 1/3 3. Vagus - root of tongue |
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What is the number of buds per papilla and tongue surface area of each different papilla type?
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1. Filliform- no buds
2. Fungiform- 3 buds, 24% 3. Foliate - 600 buds, 28% 4. Circumvalate- 250 buds 48% |
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Match the nerve to its ganglion:
7,9,10 Geniculate, Nodose, Petrosal |
Facial- Geniculate
Glossopharyngeal- Petrosal Vagus- Nodose |
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What taste buds are present on palate?
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Sour and bitter.
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Loss of taste
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Ageusia
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Altered taste
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Dysgeusia
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