Term
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Definition
Odourants come in contact with
olfactory epithelium and pass through the cribiform plate via CN I (actually many small nerve fascicles) to olfactory blub in anterior forebrain
olfactory tract triggers limbic system |
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Term
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Definition
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Term
| Characteristics of Olfaction |
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Definition
Highly Sensitive: About one odorant molecule per 1000 receptors generates a response
Adaptation (complete): Don’t detect persistent odours |
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Term
| Why do dogs smell better than Humans? |
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Definition
Larger olfactory epithelium so more receptors (250 million vs 6 million)
Twice as many active receptor proteins
Olfactory bulb is much larger (~30 fold relative to brain size)
Vomeronasal organ is inactive in humans |
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Term
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Definition
Very closely linked to olfaction – over 75% of flavour comes from sense of smell
however taste will be lost with removal of the tongue |
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Term
| Two General Ways of Taste |
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Definition
Small charges particles/ions enter taste receptors through ion channels in microvilli (SALTY AND SOUR)
Molecules bind to receptors (SWEET AND BITTER) |
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