BIosci Olfaction and Taste
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Transcript of BIosci Olfaction and Taste
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7/24/2019 BIosci Olfaction and Taste
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Olfaction
Nose
Sense of smell
Occurs in response to airborne molecules calledodorants
Consists of Olfactory Neurons
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Olfactory Neurons
Bipolar neurons within the Olfactory Epithelium
Dendrites of the Olfactory Neurons extends to theepithelial surface and the ends are modied with lonthat lie in a thin mucuslm
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Odorants
a substance giving o a smell especially one used to giveparticular scent or odour to a product
Airborne Odorants become dissolved in the mucus onsurface of the epithelium and bind to receptor molecules
membranes of the speciali!ed cilia "he binding of the odorant to the receptor initiates action
potentials which are then conducted to the olfactory cortthe Cerebrum by sensory neurons
"here are at least #$$ Olfactory receptors in human%
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Neural &athwa
for Olfaction
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"aste
"ongue
the sensation of 'avor perceived in the mouth and thon contact with a substance%
Taste buds
Divided into 5 BASIC types namely( SWEET, SOURSAT!, "#TTER, U$A$#% "hey are the reason whycan perceive many di% tastes
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"aste buds
)re sensory structures that detect taste stimuli
Oval shaped structures located in the surface of thetongue%
Can also be found in the di% areas of the mouth and
pharynx
Consists of * types of cells Speciali&ed Epithelia'ells +,xterior supporting capsule of each taste buTaste cells +.nterior supporting capsule-
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"aste Cells
Contains hair li/e processes called 0taste hairs1
"aste hairs extend into a tiny opening in the surrounstratied epithelium called a 0taste pore1
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Neural &athways
for "aste