Lecture 10

Lecture 10 - Olfaction induced sensitivities Olfactory...

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Olfaction: induced sensitivities Olfactory imprinting: e.g. salmon Reproductive behaviors: there are seasonal or hormonal shifts in olfactory sensitivity - Starlings become sensitive to plant volatiles during the breeding season - Human females often show increased sensitivity to food-related odorants during the first three months of pregnancy Olfactory sensitivities can be induces - Kin selection experiments o Benefit from knowing who you grow up with o Non-related kin will recognize one another if reared together - Professional human noses o Non-human as well canine Can detect cancer cells in samples Perceptual words - The umwelt - Sensory filter / sensory ecology - Chemical words o Olfaction o Gustation (Taste) o Vomeronasal (pheromones) o “Common” chemical sense o Other chemical senses - Mechanical worlds - Electromagnetic electromagnetic words Taste - Receptors respond at higher threshold than olfactory receptor - Types of stimuli vary between species o Humans taste sweet, salt, sour bitter o Fishes and birds taste amino acids - Location of receptors varies between groups of animals o Mammals: taste receptors are on the tongue o Fish: taste receptors can be on body, face , and barbules o Birds: taste receptors can be on the tongue and in the crop o Insects : taste receptors are on the feet Gustatory transduction Tastant binds to receptor transduction event voltage change transmission to taste centers via the lingual nerve Taste sensitivity in humans is reflected bu the number of taste buds on the tongue Vomeronasal (pheromones) - Humans don’t have - The VNO is sometimes called a pheromone detector in the same way that the nore is an odor
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Lecture 10 - Olfaction induced sensitivities Olfactory...

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